plonger au Japon
ASPECTS PRATIQUES
Comme c’est souvent le cas au Japon, la pratique locale de la plongée a développé ses propres particularités en termes d’étiquette, d’approche et de culture de la plongée. et se distingue par certains aspects plus pratiques que nous allons aborderons ici.
Il faut garder à l’esprit que plongée japonaise actuelle est l’héritière d’une assez longue tradition, développée dans un isolement partiel découlant principalement en raison de la barrière que constitue la langue japonaise.
Ceci est vrai tant dans l’archipel qu’à l’étranger, où les plongeurs japonais préféreront, dans l’ensemble, plonger dans des structures offrant des services en japonais, et fonctionnant dans le cadre des codes culturels nippons.
Ce isolement relatif permis de développer et renforcer certaines tendances et pratiques parfois un peu surprenantes, que nous allons présenter brièvement à travers les pages de ce site.
Mais le Japon est loin d’être le seul pays dans ce cas.
Prenons par exemple la culture de la plongée la plus répandue en France métropolitaine, qui se pratique dans le cadre des normes strictes d’une loi française juridiquement contraignante (le Code du sport), en osmose avec les standards de fédérations françaises affiliées (elles-même affiliées à la CMAS, dont la France est un membre fondateur et important).
Cette plongée française (parfois appelé école française de plongée, souvent avec une certaine fierté qui n’est pas sans rappeler celle qu’attachent les guides nippons au le style japonais d’encadrement des plongeurs) est soutenue par une vie associative très active et une forte pratique en club (à tel point que les plongeurs francophones appelent souvent toutes les structures organisant de plongée, quelles qu’elles soient, des clubs de plongée…), présente un profil quelque peu similaire en terme d’isolation (relative) et d’autoréférence culturelle.
En effet, la plongée française, comme la plongée japonaise, s’organisent toutes deux dans son propre cadre de référentiel, qui peut être tout aussi surprenant pour des plongeurs qui y sont extérieurs…
Les organismes de plongée au Japon
Comme dans la plupart des pays asiatiques, la plongée japonaise se pratique principalement sous une forte influence des normes du RSTC.
Le RSTC, ou WRSTC, acronyme du World Recreational Scuba Training Council, et est un organisme créé aux USA en 1999 dans le but d’établir des normes minimales pour les formations de plongée sous-marine de loisir, normes et standards partagés par toutes les agences de certification qui y sont affiliées.
La plupart des agences affiliées sont d’origine nord-américaine, et ont des motivations commerciales affirmées.
Parmi elles, ont compte des organsisations telles que PADI, SSI, SDI ou la NAUI, qui partagent donc aujourd’hui des normes de formation communes, et délivrent certification aux niveaux unifiés, pour les plongeurs, encadrants et formateurs (Open Water Diver, Advanced Open Water Diver, Rescue Diver, Divemaster, Instructeur etc…).
Il est important de spécifier que ces agences ne réglementent en fait uniquement les formations de plongeurs, et non la pratique pour les de plongeurs certifiés.
Cependant, l’influence des normes appliquées lors des formations des plongeurs et aussi celles des encadrants influe fortement sur l’organisation même des plongées récréatives / d’explorations” / fun-dives, même lorsqu’aucune formation n’est proposée (ce que certains plongeurs surnomment la plongée de type PADI).
Cela ne signifie toutefois pas qu’aucune autre organisation de plongée n’est présente dans le pays.
Il existe par exemple un certain nombre de fédérations affiliées à la CMAS au Japon, ainsi que des clubs et des structures appliquant les normes CMAS souvent plus exigeantes pour le passage des niveaux de plongeur (Plongeur CMAS Une Étoile* , CMAS Deux Étoiles*, CMAS Trois Étoiles ***/Guide de palanquée / Dive Leader, etc.).
Le BSAC (British Sub-Aqua Club (qui applique des standards similaires à ceux de la CMAS dont il était autrefois membre) est également bien implanté, et il existe aussi des agences axées sur la plongée technique / tek.
Cependant, les normes de formation les plus courantes, ainsi que le style de plongée loisir qui en découle sont le plus souvent directement issues des normes de formation RSTC.
Ceci s’explique aussi en partie par les liens historiques qui unissent le Japon et les États-Unis, où fut développé le modèle RSTC, depuis la fin de la Seconde Guerre mondiale.
DANS LE DÉTAIL
En ce qui concerne les agences affiliées au World Recreation Scuba Training Council / RSTC, PADI est actuellement le leader du marché dans le pays.
La branche japonaise de PADI Asie-Pacifique a délivré plus de 2 millions de certifications depuis la création du premier bureau international à Tōkyō en 1979, ce qui confère au Japon la place de deuxième pays au monde en nombre de plongeurs certifiés par PADI.
Cependant, la première agence non affiliée à la CMAS à s’être implantée dans le pays était en fait la NAUI, qui a établi une première base au Japon seulement quelques années après la création de l’agence en 1960.
Un ICC (session de formation de formateurs) NAUI a eu lieu au Japon en 1970, et constitue le premier programme d’enseignement de la plongée sous-marine non CMAS du pays, près d’une décennie avant l’arrivée de PADI sur le marché japonais.
En raison de son histoire particulière, la NAUI est toujours bien représentée au Japon, en particulier chez les plongeurs plus âgés et aussi dans la région d’Okinawa.
Et comme ailleurs en Asie, les centres de plongée affiliés SSI sont en constante augmentation, et SDI/TDI renforce aussi sa présence dans le pays (cet organisme est particulièrement apprécié pour les passerelles qu’il offre aux plongeurs loisirs vers les programmes de plongée technique de l’agence principale, TDI)
Le Japon compte également un certain nombre de fédérations de plongée sous-marine affiliées à la CMAS, notamment :
la Japan-CMAS (JCS),
la CMAS Instructor Association Japan (JCIA),
la Japan Educational Facilities Federation (JEFF),
la Kansai Sports Diving Federation Japan (KD Japan),
la Marine Techno Educational System Diving Division (MTES)
ainsi que la Japan Underwater Sports Federation (JUSF), axée sur la pratique des sports subaquatiques.
Le BSAC, qui applique des standards similaires à ceux de la CMAS (dont il formait autrefois une fédération membre), a également une présence active au Japon, en pleine expansion.
Pour ce qui est de la plongée technique, outre les programmes tek des agences RSTC ainsi que ceux l’agence TDI précédemment mentionnée, vous trouverez au Japon des communautés de plongeurs et des possibilités de formation GUE et IANTD.
En ce qui concerne la plongée en apnée (“plongée libre”, freediving), outre les programmes de formation à l’apnée désormais proposés par l’ensemble des agences de plongée RSTC, vous trouverez plus spécifiquement une fédération affiliée à l’AIDA, la Japan Apnea Society (JAS).
Il existe aussi des structures affiliées à l’Apnea Academy et aussi la section apnée de la fédération japonaise de sports subaquatiques affiliée à la CMAS.
Il est fort probable que la pratique de l’apnée va continuer de se développer au Japon, comme c’est actuellement le cas à travers le monde (et n’oublions pas que le Japon a sa propre tradition d’apnée professionnelle très ancienne).
Les associations japonaises dédiées à la plongée loisir comptent la Japan Leisure Diving Association JLDA et également la Japan Scuba Diving Association.
Pour ce qui est des associations professionnelles, il existe une association regroupant les plongeurs professionnels disposant du brevet d’État japonais (secteur loisir ou industriel), la Japan Dive Association (JDA), ainsi que la Japan Professional Scuba Diving Instructors Association (JP) qui accueille également la Japan Snorkelling Federation.
Les structures affiliées à la JP émettent leurs propres cartes de certification, alignées sur les niveau de plongeurs RSTC.
Une autre structure validant des niveaux de plongée est la Stars Net-diver School dont le réseau d’écoles émettent des cartes de certification suivant les niveaux plongeurs RTSC ou CMAS.
Au-delà des organismes de formation et de certification, d’autres structure liées à la plongée sous-marine existent au Japon, comme la Scuba Diving Guide Association (Guide-Kai), une association plutôt unique réunissant des célèbres guides de plongée Japonais (plus d’informations à ce sujet ici).
Par ailleurs, l’office national du tourisme japonais, la Japan National Tourism Association (JNTO), a récemment créé un site dédié à la promotion de la plongée sous-marine au Japon, Japan Diving, que nous recommandons vivement, car il constitue à nos yeux l’une des meilleures source d’information locale sur les sites de plongée du Japon.
Nous saluons également l’excellent travail de l’organisation à but non lucratif NPO Japan Diving Experience, qui effectue un excellent travail de promotion et aussi de liaison, en aidant les plongeurs ne parlant pas le japonais à entrer en contact avec les opérateurs japonais locaux, et qui pourra être d’une aide précieuse aux plongeurs audacieux voulant tremper leurs palmes dans ces eaux japonaises encore si peu connues !
Source de l’image: bucho-diver.com/2019/06/06/fins-for-scuba-diving/
Un cadre légal spécifique
Au-delà des normes de formation des divers organismes de plongée présent dans le pays, le Japon dispose d’une législation propre régissant la pratique des activités sous-marines professionnelles.
Bien que ce cadre juridique soit fortement axé sur les activités de plongée industrielle (scaphandriers), son influence s’étend à la plongée loisir, puisque les moniteurs de plongée exerçant professionnellement au Japon devraient, en théorie, tous détenir un Brevet d’État de plongeur professionnel, le Sensui-shi Menkyo 潜水士免許, pour avoir le droit de travailler légalement dans les eaux japonaises.
Les agences de formation comme PADI prennent en compte cette spécificité nationale, comme sur cette page destinée aux futurs encadrants japonais, clarifiant certains points d’articulation entre le statut d’instructeur et le brevet d’État japonais.
La Japan Dive Association (JDA) représente par ailleurs les plongeurs professionnels (scaphandriers, moniteurs ou autres) agréés.
Précisons qu’il ne s’agit pas là d’un « Code du sport », à l’image du cadre juridique français par exemple, où tous les moniteurs sportifs sont tenus d’être titulaires d’un brevet d’État pour être autorisés à enseigner en étant rémunérés pour leurs activités.
Il s’agit plutôt d’un cadre législatif visant à régir toutes les activités professionnelles en milieu hyperbare, constituté d’une série de lois nationales encadrant le travail, la sécurité et la santé qui imposent certaines restrictions pratiques.
À titre d’exemple, l’article 15 de l’Ordonnance sur la sécurité et la santé au travail en conditions hyperbares (高気圧作業安全衛生規則) réglemente la pression partielle maximale d’azote autorisée dans les gaz respiratoires à 400 kPa (c’est-à-dire 4 bar), ce qui correspond à peu près à la PpN2 atteinte lors d’une plongée à l’air à 41m, profondeur elle-même arrondie à 40m dans le texte.
Le but de cette disposition légale est avant tout de contraindre les plongeurs professionnels à un certain conservatisme dans l’approche et la gestion de la narcose gazeuse.
Mais dans les faits, cette disposition limite la profondeur maximale légalement autorisée pour toute plongée utilisant l’air comme gaz respiratoire à 40 mètres.
Source de l’image: https://www.shikaku.fun/entry/diver-license
Types de plongées
La plongée du bord est très courante au Japon, car les longues côtes souvent très aménagées du pays offrent un accès facile à de nombreux spots.
La plongée du bord est particulièrement répandue sur les côtes rocheuses de l’île principale de Honshū par exemple, où les points d’entrée de certains sites, en particulier à proximité de la mégalopole Pacifique, sont spécialement aménagés pour les activités subaquatiques.
La vie des plongeurs locaux est facilitée par des infrastructures dédiées comme des parkings et un accès aménagé avec des rampes, mains courantes et des cordes au niveau des points d’entrée, et souvent des douches pour se dessaler après la plongée (quand ce ne sont pas des sources chaudes en plein air…)
Disons que c’est l’un des aspects positifs de la bétonisation massive des côtes japonaises, où d’inévitables aménagements en béton, tétrapodes ou autres, couvrent plus de 50 % des rivages du pays…
Certains lieux offrent une expérience hybride : à l’Izu Ocean Park (département de Shizuoka, région du Kantō), vous vous enregistrez à votre arrivée, et êtes ensuite libre d’utiliser les installations à votre guise entre 9h (ouverture et première immersion) et 15h (limite pour la dernière immersion).
Précisons aussi qu’il ne faut pas sous-estimer les possibilités offertes par la plongée du bord au Japon.
Les rivages locaux peuvent certes offrir une plongée standard, souvent avec une excellente vie macro.
Mais les zones plus exposées et/ou donnant sur des eaux plus profondes peuvent offrir des plongées bien plus dynamiques, où les rencontres avec du gros, des bancs de poissons et même des scènes de prédation ne sont pas rares, en particulier sur les îles plus éloignées…
Il est même possible de voir des bancs requins-marteaux halicorne lors d’une plongée du bord ayant lieu très tôt le matin dans les îles Izu, par exemple…
Plongée du bord, Izu Ocean Park, péninsule d’Izu – Source de l’image: expedia.com
La plongée en bateau est également très courante, en particulier dans les îles du sud.
Les plongées se font principalement à partir de bateaux confortables conçus pour la plongée, souvent équipés de douches, qui naviguent à grande vitesse vers les sites des environs ou, dans certains cas, vers des spots plus éloignés, généralement des petites îles accessibles uniquement en bateau.
Dans les zones plus reculées, la plongée bateau se pratique aussi à partir de simples bateaux de pêche convertis, au confort parfois sommaire.
Il est important de garder à l’esprit que la plupart des villes côtières du Japon ont encore, à ce jour, d’importantes activités de pêche, ce qui contribue parfois à restreindre l’accès par bateau à des zones de plongée potentiellement intéressantes, qui sont réservées aux pêcheurs locaux.
Dans certaines régions, les bateaux de plongée permettent l’accès à des spots avancés avec du courant,
(mais généralement plus modéré qu’en Indonésie, aux Maldives ou aux Palaos), offrant de bonnes plongées dérivantes comme, dans l’archipel des Nansei, à Yonaguni, Miyako, Kume, ou autour des îles Kerama et Amami, ou encore pour la célèbre plongée requins-marteaux de l’île de Mikomoto, à Honshū.
Bateau de plongée – Source de l’image: wtp.co.jp
Les croisières-plongée (liveaboard) sont à l’heure actuelle très peu développées au Japon (2021), à l’exception de quelques courtes croisières semi-privées autour des îles d’Okinawa, prenant souvent la forme de bateaux charterisés à destination de populations spécifiques de plongeurs, tels que les photographes sous-marins.
Cependant, si les crosières-plongées domestiques sont encore très rares, les choses évoluent actuellement, peut-être en raison des restrictions actuelles sur les voyages internationaux induites par la pandémie de Covid-19.
Jusqu’à présent, les rares croisières organisée dans l’archipel était principalement concentrées sur des groupes d’îles de la région d’Okinawa ou les îles Satsunan du sud de Kyūshū.
Un opérateur, Stingray Cruises,, organise également des sorties en bateau et de courtes croisières dans la région de la mer de Genkai et aussi dans la région de Saikai (îles d’Okinoshima, îles Iki et îles Gotō) dans le nord de Kyūshū ainsi que les îles Satsunan du sud de Kyūshū.
Leur branche axée sur les îles Satsunan, Tokara Discovery Cruises, propose des croisières d’exploration de 3, 4, 5 et 7 nuits autour des îles Tokara / de l’archipel des Satsunan, mais ces croisières restent actuellement, pour des raisons logistiques, hors de portée des plongeurs ne parlant pas japonais.
Plus d’informations sur les croisières de croisière japonaises ici, ainsi que d’autres liens.
Nous verrons bien si les croisières plongée se développent à l’avenir dans l’archipel.
Toutefois, certains aspects pratiques, tels que les conditions météorologiques et l’agenda des plongeurs japonais viennent compliquer l’organisation de croisières régulières, comparé à des endroits comme l’Indonésie ou la Thaïlande, par exemple.
Itinéraire de croisière-plongée dans les îles Tokara – Source de l’image: tokara-dive.jp/cruise/
Technical diving support is rare.
Unless one is already the member of some sort tech diving community with a local presence, local support for technical diving is generally not available.
One major exception is the Osezaki area (Shizuoka Pref., Kantō region, Honshū island), where an operator is quite supportive towards technical divers, and offers, on advance special booking, a larger range of range of onsite gas-filling options (nitrox, trimix, oxygen…), along with rental of doubles, Sofnolime for rebreather divers, and aluminium tanks for sidemount configurations.
Guided diving is the norm.
While Japan offers many opportunities for easy-access shore diving, divers actually rarely practice completely autonomous, unguided diving, unlike in the North American context, for instance.
Although there are exceptions, Japan is not generally a place where certified divers can just show up and a dive centre, rent tanks and weights, and go do their thing.
Unguided shore diving is not really encouraged in the country, and most structures i.e. dive clubs and dive centres, will not generally rent tanks, even to certified and qualified advanced divers, if they do not know them, for safety and responsibility.
Some areas might also have specific local rules, stating that all visiting divers must be accompanied by a local dive guide.
There are exceptions of course, such as the previously mentioned Izu Ocean Park (Shizuoka Pref.), where divers have free use of the facilities and rental equipment, organising their own two dives within a set timeframe.
Dive site map – Image source: divingpoint.net
And yet in Japan, most locally organised diving, whether directly from shore or from a boat, will be guided diving, mostly led by a local dive guide following teaching standards and “good practices” given by RSTC organizations.
This is actually often preferable, because good local guides will generally allow you to make the most of your dive through their intimate knowledge of the dive site, and for safety, since conditions can change easily (and let’s not forget the Kuroshio flows at an average of 3 knots in some places off the coast of Japan, which would mean quite a drift for divers caught directly in the main flow…)
And importantly, since this one of the distinctive traits of Japanese diving, local dive guides will frequently be highly knowledgeable when it comes to the local underwater fauna and flora (which is particularly appreciated by photographers), as both dive centres and guides they employ make a point of acting as ambassadors of the local environment they represent.
Japanese guides generally go beyond the traditional roles of “divemaster” and “eagle-eyed local spotter”, and this rarely found elsewhere, except perhaps in certain contexts employing marine biology specialists, or macro-diving specialised areas like Lembeh in Indonesia, for instance.
More on Japanese-style dive guides here.
Snorkeling is common, freediving less so.
Japan also offers some good snorkeling options, but these are mostly concentrated in the southern subtropical areas (Nansei islands, Okinawa region), where shallow coral reefs can be accessed from the beach.
Beware though, some industrial snorkeling operations found in the Okinawa area not really up to standard, and reef fish feeding was unfortuantely still quite widespread until recently (something also found for discover scuba diving / try-dives offered to non-certified divers).
In other parts of the country, snorkeling.skin diving activities may be limited by water temperatures, sea conditions and rocky shorelines – this is not always the case though, and the Nanpō archipelago, for instance, offers good snorkeling spots and guided snorkeling tours, despite more rocky conditions.
For more serious / experienced snorkelers and freedivers, Japanese waters have the potential to offer great experiences, including open water options and the chance to get in the water with large marine mammals, notably dolphins in Mikura-jima and Miyake-jima in the Izu islands, and also, in the cooler season, with migrating whales, especially to the north of Okinawa.
Dolphin swim in Mikura-jima – Image source: ponta-dolphinswim.com
These activities are usually called something like “whale swim” or “dolphin swim“, and while some operators do a great job, you might encounter a great variety in operating standards and practices, notably in terms intrusiveness, awareness and respect of the animal’s well-being across the country.
Some areas like the Ogasawara islands forbid entering the water less than 100 to 150 metres from whales, depending on the species, which limits in water interraction.
This kind of rule might be extended to other areas in the future.
Finally, there is also the possibility to organise a shallow-water freediving experience with ama traditional freedivers in the Kansai region (more on this here).
Breath-hold spearfishing is generally off-limits in Japan, as it requires a permit from local fisheries in most places, pernmit which is not open to non-Japanese nationals, but there might be regional exceptions.
As elsewhere in the world, the freediving community is growing, helped by the fact that Japan has has good results in the competitive freediving scene, including some world record holders in different categories.
Beyond entry-level training, nost of the modern freediving action seems concentrated in the Okinawa region, but this may change in the future…
Structures de plongée
Japanese divers generally dive through dive centres located near major dive spots, which range from simple dive-shops to all-inclusive diving resorts also offering accommodation and dining options, especially in more remote areas, and everything in between (dive centres able to organise accommodation, etc…).
In most tourism-oriented coastal towns and islands, dive operators will usually have some sort of accomodation option available (hotel, homestay or dorm or a minshuku Japanese style bed and breakfast lodgings), either as cooperation between the dive operator and the hospitality provider, or actually part of the dive business itself.
Because of this, divers will generally have access to some type of package deal including accommodation and meals in a convenient (and often tasty) all-in-one package.
Local divers in more urban, landlocked areas also often make use of dive centres located in the city, far from the sea, which offer a hybrid service, somewhere between a diving-club and a travel agent.
These city-based dive centres usually organise regular (weekly or more) diving excursions to different areas of the archipelago.
Some of these urban structures take the form of an associative club, with membership fees, but most are simply commercial structures responsible for organising training sessions and diver certification, as well as selling/renting equipment and taking care of diving logistics for the divers who pay for their services.
These structures will generally offer some sort of transportation service, and can often take care of all the organisational aspects of a dive outing, which is very handy for time-pressed Japanese divers.
On a cultural side note, you’ll see many Japanese operators calling their dive centres XYZ diving service or XYZ marine service, but this seems to be something of a trend and does not represent a specific business category.
Dive center in Ōsaka – Image source: https://www.facebook.com/SukyubadaibingushoppuBonuru/
In all cases, as with many things in Japan, it will be necessary to book in advance.
Most Japanese divers, like the majority of the Japanese population, have much less free-time and vacations than their European counterparts, for example. This does not stop them from going diving very regularly, but also means diving activities are usually very well organized, in an effort to try to waste as little time as possible.
Which also means there is little room for flexibility or improvisation, which is why you should always remember to book in advance, rather than hoping to join a dive trip at the last minute…
It is also better to try to avoid weekends if at all possible, which are often very busy, as well as major holidays, that constitute the peaks of Japanese high season for all leisure activities.
The main holidays to look out for are the Golden Week, a collection of four 4 national holidays within seven days (the core being April 29 to May 5), which, in combination with well-placed weekends, is one of Japan’s three busiest holiday seasons.
The other dates to look out for are the O-bon week (generally August 13 to 16) and New Year’s break (which has less impact on domestic diving since it is in winter) – more on Japanese holidays here.
Diving crowds at Osezaki, Shizuoka Pref. – Image source: fujikaze.cocolog-nifty.com
Paiement et prix
Payment
If the structure you’re diving through acts as a booking agent, which is generally the case when diving through a city-based dive centre for instance, you will pay them directly, in advance, and they will handle payments to the on-site dive operator that will be welcoming you.
Remember to check the payment options available beforehand, as credit cards are not accepted everywhere.
Also remember that there is virtually no tipping in Japan – at least not in a standard commercial service setting (some form of tipping does exist, but it is restricted to specific, traditionally defined contexts and highly formalised, of which scuba related activities are definitely not a part of), so there is no need to plan a tip for your dive guide or staff.
If you do want to give something, give little gifts instead, especially snack food and drinks for instance.
As a cultural side note, Japanese divers going diving overseas will often bring Japanese food as gifts for the staff of dive centre where they will be diving – this is highly appreciated by Japanese staff, especially in more remote places where Japanese products are rare!
One place where we worked had a dedicated staff-fridge, always full of delicious Japanese snacks and other temiyage/omiyage, ranging from rice crackers and sweets to bottles of shōchū liquor!
Korean divers often bring cosmetic facial masks as well, along with endless snacks. Maybe you can try to invent your own national gift tradition?
Omiyage – Image source: https://www.jalan.net/news/article/306696/
Diving prices
Diving in Japan is not cheap, in that it is definitely more expensive than what you find in certain locations operating at rock-bottom prices, especially in South-East Asia or the Caribbean for instance.
However, diving is not extraordinarily expensive either, and you’ll find that boat-based fun-diving prices are now, in most cases, roughly on par with many other locations around the world.
And conditions found on boats, along with your typical dive-centre facilities and service, are often superior than what you would find elsewhere, and nitrox, when available, is often free of charge for certified divers.
Diving in Okinawa also tends to be cheaper than elsewhere in Japan.
As a national average, a 2-tank boat will usually be around 130 euro / 160 USD – which is indeed on the high-side, but not incredibly expensive, actually cheaper than places we have worked at in Indonesia’s Komodo, Mexico’s Sea of Cortez or Thailand’s Andaman sea.
That said, some areas, especially in Honshū do charge a lot for shore diving (up to 30 euro/40 USD per tank), but this does include use of dive centre facilities, which again are usually quite superior to what you would find elsewhere, and also the services of a competent dive guide, which, as previously explained, is often mandatory since most dive centres will refuse to simply lend tanks to certified divers they do not know.
As an illustration, Shizuoka’s Izu Ocean Park charges roughly 55 euros / 65 USD for 2 tanks with weights (unguided shore diving), with full use of their facilities between 9am and 3pm. The facilities include heated changing rooms, 31 shower heads and hot baths in which you can hop in with your dry suits on during the cold winter season (keeping in mind that this is not considered ideal in regards to post-dive decompression / off-gasing…)
Some city-based dive centres and local resorts might offer interesting packages including diving, transportation and sometimes accommodation options.
Courses
Dive training courses (and imported equipment prices, imported brands are often almost 50% more expensive than in Europe or the USA…) are on high side in most cases, so keep this in mind if planning to do dive courses in Japan.
It has also been reported to us that some dive centres sometimes withhold certification, spreading out the training over mandatory, paying training sessions.
We are both diving instructors, and familiar with both club-based dive training (where certifications can take up to one year per level, in a typical French CMAS club setting for example) and the standard 3 to 4 day Open Water-type courses commonly offered in holiday destinations.
While we totally understand and welcome the option to take more time and work on skills with a student (which is one of the great things about regular club training), and also firmly believe you should only certify students truly meeting required skill requirements, we also believe that any extra training required should to stay within the bounds of reason, especially in commercial contexts.
When extra training is required, it should definitely not lead to students paying a lot more than they had be told to actually get certified.
This is hopefully rare, and probably restricted to Japanese-language environments, but as a general recommendation do ask around, and enquire about the teaching process when planning to do some dive training, in Japan or elsewhere.
Entry level certification, 2 days 1 night program – Image source: blog.mic21.com
Équipement et location de matériel
Japanese divers often have their own equipment, but many facilities offer do equipment rental options, which is generally well maintained, if a little pricey.
If planning to dive in the cool season or northern waters, however, please note that drysuit rental is not very common, and even if it is possible, it might be difficult to find larger size suits, or even for common builds – this is definitely something to look out for if you plan to dive in Japan in winter.
As a rule, it is best to check what sizes are available, as common clothing and foot sizes in Japan are generally smaller than those commonly found in other countries, which tends to restrict the availability of “large” sizes, both for hire and for sale, especially in dive centres not specialising in a non-Japanese clientele.
Cylinders/ dive tanks are generally made of steel (10L / 12/ 14L steel tanks are the most common, some areas might have 18L as well), but AL80 aluminium tanks (11 litres) so common in tropical locations, are also used in the warmer waters of Okinawa, for example.
If you’ve never dived on steel tanks, the main difference with aluminium tanks is that they become less negatively buoyant at the end of the dive, as you breathe up the air they contain.
They never become positively buoyant at the end of the dive, unlike aluminium tanks. Steel tanks are also heavier (which is why they’re the most common tanks used for diving in cooler waters, where diver more exposure protection), so substract roughly 2 kg from the weight you normally use with aluminium tanks when diving steel.
Please note that outside rare structures offering technical diving service, tank valves in Japan are almost exclusively yoke/INT – we strongly recommend that you bring a DIN to yoke adapter if you’re diving a DIN first stage like we do, because Japanese dive centres will not necessarily have adapters, or enough for a group of divers with DIN regs…
Independent double-outlet, Y or H valves like those found mostly in continental Europe are also not found in Japan, so remember to set up your octopus on a first stage before travelling if you normally dive with two independent first-stages.
It will be quite difficult to rent twinsets, as commercial support for slightly more “technical” is virtually inexistent outside already established diver communities, with the Osezaki area (Shizuoka Pref.) being the exception to the rule.
Sidemount diving is not that common, but is growing in Japan, in relation with efforts of major RSTC certification agencies to promote side-mount training, but sidemount divers should keep in mind that aluminium tanks are not the norm, meaning that in most places only steel tanks are available…
Remember to check with the dive centre to see if they have no problem with you diving sidemount, and also confirm their shore/boat logistics.
Also do check if they have aluminium tanks if required, and remember to bring spare parts for your sidemount kit.
Even if there is a strong North-American influence is Japanese diving, the country is resolutely metric, and pressure gages are all in bar (and not in PSI).
Weights will also be given in kilograms, rather than pounds.
Likewise, dive briefings will be given in metres, not feet, and temperatures in degrees Celsius/centigrade (for the record, Japanese laws regulating underwater activities give pressure indications in pascal units, kPa, MPa…).
Refer to our metric / imperial cheat-sheet for more info.
Nitrox is often available (check with your dive centre) and commonly free of charge. Maximum operating depths are calculated based on a maximum oxygen partial pressure of 1.4 bar (and not 1.6 bar like, it is sometimes found some European countries, like France for instance).
When it comes to equipment setup, Japanese divers are usually quite self-sufficient, at least when it comes to setting up their own gear, especially if it’s their own personal equipment.
Some places might offer to do a basic set up of your equipment, as a service or for practical reasons, especially for boat dives, but this is not the norm, unlike
South-East Asia and other places where it is common for dive staff and/or boat crew to setup customer’s gear for them.
If you would rather set up yourself (and we definitely think you should…), or not have anyone touch your own equipment, make sure to mention this at the dive centre, just in case…
For electronics, Japan uses 100 V / 50/60 Hz voltage (which is the lowest in the world, Europe being 220-240V and the United States 110-120V) and Type A plug sockets, which has two rectangular-pins, that are vertical to each other.
Most devices can handle lower voltages , but battery charging might be slower.
Décharges de responsabilité et certificats médicaux
Japanese dive centres will ask you to fill out standardised liability release and risk recognition forms, usually the model provided by the RSTC agency to which the dive centre is affiliated (PADI, SSI, NAUI, SDI…).
Should an accident occur, the exact legal value of these documents is difficult to establish in Japan (the Japanese legal system is complex, and something of a hybrid between civil and common law) but these documents are always required by operators, unlike in European legal contexts where liability release-type documents have little value and their use is now downplayed, or where they might be technically illegal, such as in the French context, where the operator is bound by law to accept responsability.
The dive centre staff should normally do everything they can to ensure your safety, but diving does engage a part of individual responsibility (自己責任, jiko sekinin, which has become a very common concept in Japan), and Japanese dive operators will normally not let you dive without a signature of these documents.
Do note that some dive operators will only have a Japanese version ready to use, and you should, of course, not sign any documents that you cannot read.
When diving with a Japanese dive centre, we recommend that you check in advance that an English version of required forms will be available (all RSTC agencies make multilingual forms available free of charge online, but you must also know how to find them).
While it is always a good idea to do regular medical check-ups and get a doctor’s clearance for diving (especially after entering middle-age and if planning to dive in more stressful conditions such as colder water or current, for instance), it is not a legal requirement in Japan to show recent medical certificate giving you clearance to dive, and Japanese dive centres will generally ask you to fill out with a standard RSTC medical questionnaire instead.
Again, make sure that this document will be available in a language that you can read, and note that if you have to answer “yes” to any of the questions on the medical questionnaire, you will have to see a doctor (general practitioner) and obtain clearance to take part in diving activities.
This is in no way specific to diving in Japan, but you’re not familiar with this kind of medical form and/or think you might have a condition mentioned on it, it could be a good idea to ask the dive centre to see their medical questionnaire in advance, in order anticipate problems, and getting medical clearance, if required, before your trip.
PADI Medical questionaire sample – Image source: pros-blog.padi.com/
Assurances
Japanese diver centres usually provide some basic insurance coverage for their customers, but this does not extend to emergency hyperbaric recompression treatment.
And this recompression chamber treatement can be very expensive, often in the thousands of dollars per session, keeping in mind that full treatment might require a set of multiple sessions…
This is also in no way specific to diving in Japan, but we strongly advise divers to get specific insurance coverage, clearly covering planned diving activities and emergencies, including medical evacuation and hyperbaric treatments.
Well-known specialised diving insurance provider such as DAN, DiveAssure, Diveassist are a good choice, and some insurance companies like Dive Assure offer packages covering the duration of a single trip.
Another option would be more general insurance policies that also cover recreational diving activities, such as those offered by WorldNomads, SafetyWings or others (but they probably won’t be as efficient in handling diving emergencies as specialist inssurance).
If you are already covered by general travel insurance, make sure to check that it does indeed cover your planning diving activities in Japan or elsewhere, and other key aspects such as hyperbaric recompression treatments and medical evacuation / repatriation from Japan.
Dan Japan has a 24/7 Japanese emergency hotline
+81-3-3812-4999, with an English-speaking operator available from Monday to Friday between 9am and 5pm at +81-45-228-3066 – the operator / medical team can give you advice if you have health concerns after a dive, whether you are a DAN member or not (but only member’s medical expenses are covered)
There are recompression chambers in most major cities and diving areas in Japan, but these can be relatively far from the dive sites, especially in a mountainous country like Japan.
Which means that it is always best to dive conservatively, within the guidelines given by your computer, to maintain slow ascent rates of 10m per minute max, and to remember to stay well hydrated before and after the dive.
It’s also best to go easy on sake, shōchū liquor and other dehydrating beverages when diving the next day.
As a reminder, even though hot-springs are often found next to dive sites (at the Izu Ocean Park, for instance) and as incredibly tempting as it might seem, hopping into the warm waters a hot-spring/onsen straight after a dive is not recommended as it directly affects blood circulation, which could affect bubble formation and possibly interfere with off-gassing…
As with other aspects like sports after diving, jiko-sekinin (self-responsability) or not, it is recommended to wait a few hours before indulging…
Image source: danjapan.gr.jp
Certifications, brevets et niveaux de plongée
While Japan does have CMAS-affiliated federations, a branch of the BSAC and a few technical diving oriented organisations (IANTD, etc, see above for more info), the absolute majority of dive centres will be RSTC-affiliated (and mainly PADI for the time being, though this might change in the future, if we consider at the massive growth of SSI diver centres and instructors elsewhere in Asia).
If you are a CMAS-certified diver, and only have a CMAS certification, we strongly advise you to make sure to bring you certification card with you, as it can be difficult to justify your training level without it, since there is no real cross-federation centralised diver database accessible online.
Most dive centre professionals will have no problem understanding your certification level, and the following (rough) equivalence is usually applied:
CMAS * diver > Open Water diver
CMAS ** diver > Advanced Open Water diver
CMAS *** diver / CMAS **** > Rescue or Divemaster
Instructor, supervisor, moniteur > OWSI Instructor
Obviously, this somewhat reductive, as the real training situation is much more complex, with very real differences between RSTC and CMAS standards, notably regarding their approaches to notions of diver autonomy and supervision, the introduction of diver rescue/assistance training and the teaching decompression stops, and also clear differences in depth ranges and ratings.
Nonetheless, this conforms roughly to ISO standards, and most structures, in Japan or elsewhere, will apply this type of basic equivalence for the constitution of their groups of divers, and depth “ratings”.
For more details, you can also refer yourself to our homemade diver level / training agencies equivalence chart below:
While most Japanese dive centres will be RSTC affiliated, keep in mind that RSTC standards are only given for training dives.
As such, RSTC agencies do not specify any actual depth standards for recreational, “fun diving” outside of a training context, and simply recommend divers to stay “within the limits of their training and experience”, and not to dive deeper than 40m.
This maximum depth is in line with Japanese legal requirements defining a maximum partial pressure of nitrogen when diving on air as a breathing gas, as specified by Article 15 of Japan’s Ordinance on Safety and Health for Work Under Hyperbaric Conditions.
This aspect is often misunderstood, even by some dive professionals themselves who wrongly believe RSTC training standards apply actually to “fun dives”.
In the chart above for instance, depth given for RSTC agencies refer to the maximum depths specified in their training standards.
That said, one should keep in mind that, should an accident occur, the dive centre and dive professionals involved will have to be able to justify their decisions and actions, under the angle of duty of care ( which is the legal obligation imposed on an individual to adhere to standards of reasonable care and avoid negligence while performing any acts that could foreseeably harm others).
Standards or not, this is why bringing an inexperienced, Open Water Diver level-trained diver to a depth of 30m+ might raise a few eyebrows, even if it is not a breach of RSTC standards per se.
This is also why, in practice, most RSTC-affiliated dive centres will usually apply the following maximum depths, given for training dives in their agency standards, to actual exploration / “fun” dives :
– 18m max for an Open Water diver,
– 30m max for an Advanced Open Water diver or more, and
– access to the 30 to 40m depth range given at the discretion of the dive centre/guide and the diver, depending on their experience, comfort level and/or training.
We hope this clears up the situation, and helps to understand why we all should respect a dive centre and/or dive professional’s sometimes conservative guidelines, and always respect the indications given in the dive briefing and local rules.
Even if this mean diving to a max depth of 30m while avoiding any mandatory decompression stops, when you are trained and experienced in diving to 50m+ dive with deco stops in a different setting.
Diving certification cheat-sheet
Most RSTC-affiliated dive centres will usually apply the following maximum depths, given for training dives in their agency standards, to exploration/”fun” dives:
– 18m max for an Open Water diver,
– 30m max for an Advanced Open Water diver or more, and
– access to the 30 to 40m depth range given at the discretion of the dive centre/guide and the diver, depending on their experience, comfort level and/or training.
Metric / imperial cheat-sheet
