About Japan Underwater Diving Federation : Background and it’s Policy

When Scuba diving was first introduced to japan as a leisure, it was regarded as fun sports with healthy benefits. Divers had enjoyed easy-going atmosphere without causing any serious troubles. However, as its popularity grows, problems accompanied with Scuba diving become more apparent such as accidents, and conflicts with fishermen caused by divers. Hence, there is the need of building a national wide organization with instruction system for divers.

Thus, existing underwater related organizations (Japan Underwater Association, Central-Japan Diving Alliance, Western Diving Alliance and PADI Diving Instruction Association), independently active at the time, were reorganized into one organization, Japan Underwater Diving Federation, (JUDF hereafter), as the sole national-wide diving instruction organization in Japan on 18th of November 1972.

Since then, JUDF has been playing its role actively, experiencing series of events such as secession of founding organizations, and reorganization of internal structures, and registered as the first General Incorporation Association of diving instruction organization in 2012.

Currently, as the sole non-profit diving instruction organization in Japan, JUDF is expanding its activity with its policies inherited from its foundation, “enlightening and permeating safe underwater activity” and “divers to play main role”.


JUDF : What We Are

JUDF is a diving instruction organization established by professional divers, aiming to achieve wholesome development of underwater industries. JUDF consists of regular members who are certificated diving instructors, and is governed by the board of directors whose directors are elected through mutual election to reflect opinions of the members.

[Members of JUDF]

JUDF consists of regular members including the instructors as follows:
・Professional instructors engaging in diving schools and diving shops
・Instructors for students in Marin Schools/Colleges
・Instructors engaged in diving instructions as side business or hobby
・Instructors certified by JUDF as academic experts

[Aim of JUDF’s activities]

The activities of JUDF aims to realize following concepts in accordance with its policies:
・Wholesome development of underwater industries
・Enlightenment and permeation of safe diving
・Development of fellowship among the members

As a non-profit organization, the income of JUDF (membership fee, certification fee, operation income etc ) is used in accordance with the articles to achieve the aim above effectually. In addition, JUDF is committed to maintain close relationship with related government offices and public service corporations to co-operate for wholesome development of the underwater industries, dispatching committee members or directors on demand.

[Business of JUDF]

Current business of JUDF includes:
– Training and certificating instructors
– Providing courses for beginning divers and issuing certification card (C-card) on completion
– Providing courses for experienced divers: Offering advanced/speciality courses and issuing certification on completion
– Rescue supporting activity in large scale sport event, such as triathlon
– Environmental conservation activity such as cleaning up on sea floor and shores
– Environmental protection activity such as pest control in national park waters
– Holding trial class of snorkeling and scuba diving in school
– Spreading life-saving operation such as BLS (Basic Life Support) and usage of AED


JUDF’s Certification Criteria of Divers

JUDF offers courses for sport divers to build the skill of safe diving and issues worldwide reliable C-cards on completion.  The C-card is classified with the safety skill level of the holding diver as follows:

*Basic Sport Diver

The most basic C-card rank for very beginning divers.  This certification level qualifies divers who can enjoy diving with a safety administrator (instructor or assistant instructor) in a safe diving environment.

[Certification criteria]
– Checking and setting instruments for scuba diving
– Dismantling scuba instruments and washing
– Entry
– Blowing mask
– Clearing snorkel
– Fin work
– Dealing cramping leg
– Relieving ear pressure
– Mounting/dismounting weight belt (quick release), retaining buoyancy
– Mounting scuba instruments
– Breathing with scuba
– Underwater communication
– Recovering regulator
– Clearing regulator
– Transferring to regulator from snorkel
– Monitoring gauge
– Clearing mask
– Safe Descending
– Fin pivot
– Safe ascending
– Feeding air to BC for buoyancy (power inflator)
– Share-air breathing (breathing from safe second of buddy)
– Surface swimming with scuba
– Touring underwater
– Exit

*Open-water Sport Diver

A C-card rank for beginners.  This certification level qualifies divers who can enjoy buddy-diving underwater actions with a diver who has the same certification level or upper.

[Additional certification criteria]

– Skin diving, clearing mask
– Surface swimming with fin kick
– Weight adjustment
– Usage of BC and procedure of controlling buoyancy
– Horizontal underwater swimming (13 meters)
– Head first (3 meters)
– Dismantling /mounting mask, breathing without mask
– Free descending (without descending rope)
– Neutral buoyancy (hovering for 10 seconds)
– Safe ascending with buddy
– Feeding air to BC for buoyancy (power/oral inflation)
– Share air ascending
– Surface dismantling /mounting
– Underwater dismantling /mounting
– Usage of compass
– Emergency ascending procedure
– Self rescue
– Rescue in skin diving
– Rescue in scuba diving

*Advanced Sport Diver

A C-card rank for intermediate divers.  This certification level qualifies a diver who has obtained a series of secure skill of diving, including preparation, cleaning up and basic underwater actions, through a certain level of experience in various underwater environments, building knowledges and skills necessary to protect the underwater safety by him/herself.

[Additional certification criteria]

– Weight regulation (complete)
– Horizontal underwater swimming (25 meters)
– Weight dismantling /mounting (3 meters beneath surface)
– Swimming (100 meters)
– Neutral buoyancy (30 seconds)
– Launching safety float
– Navigation (with/without compass)
– Boat diving
– Deep diving (down to 30 meters depth)
– Planning and leading
– Rescue
– Checking basic skill

*Master Sport Diver

The highest C-card rank for advanced amateur divers.  This certification level qualifies a diver who can enjoy diving with buddies through various knowledges, experiences and techniques which enable him/her to serve as the leader of a club or a team.

[Additional certification criteria]

– Bare swimming, 400 meters
– Swimming with skin diving instruments, 400 meters
– Skin diving, head first to 8 meters depth
– Neutral buoyancy (at least 1 minute with ease)
– Taking all speciality courses of:
– Rescue diving
– Deep diving
– Navigation diving
– Boat diving
– Night diving