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NAUI Skin Diver Course

Official skin diver certification course of NAUI, the most trusted training organization in the world
It is a license acquisition course for those who want to learn skin diving in earnest
Beginners, those who are doing it on their own, those who want to improve
You will acquire various knowledge from the basics of skin diving to applications and safe diving.

2 days

Department + pool 1 day / Marine training 1 day

◆ Open at any time upon request ◆
calendar belowPlease select an available day from ​
(The pool is closed on the first Tuesday and Wednesday)

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Price ¥26,000(excluding tax)
(Course fee/facility usage fee/weight/pick-up from Ofuna)

​Card issue fee ¥6,000
*In the case of one-on-one on the day, +¥3,000

Equipment rental fee(1 day)

Wet suit ¥2,000
Fins, mask, snorkel ¥500 each

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Department + Pool:Miura Mitohama Beach Bum   or  Ito Marine Road 

ocean training:Enoura or Izu


An instructor with 30 years of experience as a dolphin swim guide

I will teach you how to dive beautifully easily

Beginners, those who are doing it on their own, those who want to improve more
Once you learn properly, it's easy enough to make a mistake
You will be able to dive with a beautiful form!

NAUI Skin Diver Course
Course content

Department + Pool (1 day) + Ocean (1 day)



・Efficient correct fin kick (differences by fin)

・Snorkel clear/mask clear

・Snorkeling posture and swimming style

・Swim 400m non-stop while breathing with a snorkel

・Survival swimming 5 minutes (tread swimming/floating) During this time, put on and take off the mask, fins, and weight belt on the surface of the water.

・Determining the appropriate amount of weight when wearing a wet suit

・How to dive with a jackknife

・Ear removal

・ Breathing (Practice to extend distance and time)

・Retrieving several small objects with one breath from a depth of 3m or more

・Raise the unconscious diver from a depth of 3 m to the surface (remove the weight of the accident)

Assist fatigued divers and tow 25m
・Skin diving rescue (how to treat accident victims, artificial respiration)



・Determination of the correct entry/exit method

・Putting on and taking off the mask, fins, and weight belt on the surface of the water

・Surface dive from the water surface ・Underwater movement ・Water surface rest

・Retrieving several small objects with one breath from a depth of 3m or more

・Abandoning weights, ensuring buoyancy, how to cure leg muscle spasms (independent rescue)

・Fatigue diver 25m towing



・Equipment characteristics, selection method, usage method, maintenance

・Gas pressure and volume (differences due to depth)

・Danger of breathing compressed air during skin diving

・Temperature protection, hypothermia (hypothermia), hyperthermia (hyperthermia), heat stroke

・Appropriate buoyancy (how to adjust buoyancy and weight for wetsuits)

・Differences in appearance underwater (distance, size, color)

・Shallow water blackout (loss of consciousness due to excessive breathing)

・Planning for accident prevention

・Safety measures (floats and buoyancy devices)

・Emergency measures and countermeasures in the event of an accident

・Retrieving submerged skin divers, surface assistance, towing, artificial respiration

・First aid for shock, injury, drowning, and injuries from poisonous organisms

• Currents, swells, and wave hazards and avoidance.
・Predict sea conditions according to the basics of weather charts and points.

・Environmental conservation (garbage problem, marine pollution, global warming)

・Fishery Laws and Regulations

◆ Participation conditions ◆
・Able to swim more than 25m
・Healthy people over 12 years old

*Please let us know in advance if you have heart, respiratory, or other health problems. Physician approval may be required.

* If you have a history of corona infection and have pneumonia symptoms or aftereffects, a doctor's written consent is required.


◆ Fee ¥26,000(tax not included)

*Card issuance fee ¥6,000

*In the case of one-on-one on the day, +¥3,000

rental fee(excluding tax)

・Fins, mask, snorkel ¥500 each
・Wet suit ¥ 1,000 (required)
​・Free weight rental

◆It is possible to monitor the fins. (Please let us know when you make a reservation)(¥500)
Fin monitoring is possible. (the number is limited)
If you would like to monitor, please let us know the type of fins/foot size you want to monitor in advance.

* Monitorable fins: GULL Emden, Mew, Super Mew, Warp Fin, Barracuda, TUSA Kyle

◆ What to prepare
・Swimsuits, rash guards, towels 
・Fins ・Mask ・Snorkel ・Wet suit (for those who have their own equipment)

* If you need equipment rental, please let us know at the time of application.

◆ Cancellation policy

If canceled due to customer's convenience, 50% cancellation fee will be charged from the day before to the day.

◆ Guidance at the time of meeting


July-October:Miura Mitohama Beach Bum (Outdoor pool) 8:00 Ofuna / 9:00 Keikyu Misakiguchi Station (50 minutes from Yokohama Station)

November-June:Ito Marine Road (indoor pool) 7:30 Ofuna / 9:30 Pick up at Ito Station
9:30 for those who meet locally by car

​ (marine practice)

8:00 Ofuna or 10:00 local

Click here for Ofuna meeting place

Instructor: RYO YAMAZAKI
Dolphin Swim Instructor / NAUI Diving Instructor

30 years of dolphin swimming experience
We hold about 30 Mikurashima dolphin swim tours every year, as well as domestic and overseas dolphin and whale related tours.

The trick to swimming well with dolphins is to aim for a swimming style that allows the dolphins to approach you without chasing you or heading towards you.
Learn the skills to swim safely and enjoy the sea together!

Necessary equipment for skin diving

Ease of swimming is definitely different by choosing equipment that suits your physical strength and level.

Our shop specializes in dolphin swimming and skin diving.
Our staff who are well versed in equipment actually try and sell only the best equipment, so please use it with confidence.

We will also answer your questions about equipment selection.


1. The minimum requirements for skin diving areunderwater mask, snorkel and fins3-piece set of

2.for wearing finsbootsormarine socks

3.Anti-fog mask is also required.

Four.wetsuitis worn for heat retention and buoyancy. (alternative to life jackets)

5. In the summer when the water temperature is hightapper(wet suit upper body only) etc. can also be substituted.

6. Avoid exposing your skin as much as possible to protect your body from jellyfish damage, sunburn, and injuries.

Jellyfish prevention cream/sunscreen

​◆ There are jellyfish in the sea regardless of the season.

Not only does it hurt when you get stung, but if it is highly toxic, you may get numbness and difficulty breathing, and you may be sent to the hospital.

Even in summer, avoid exposing your skin as much as possible, and apply anti-jellyfish cream to areas where skin is exposed, such as your face.

It minimizes damage in the unlikely event that you are stung.

Be sure to take sunscreen measures in the summer when the UV rays are strong.

Choose eco-friendly products

Harmful to coral and marine life that is regulated at overseas resortsDo not use products containing UV absorbersis.

All jellyfish prevention creams and sunscreens sold at our store are eco-friendly products that do not contain harmful ingredients.

Little Hands Hawaii: Popular No.1! 100% natural ingredients!Earth-friendly sunscreen from Hawaii

jerry's guard: Marine-friendly anti-jellyfish cream developed by a research team of high school students

Safety for Kids: Jellyfish prevention cream. This product does not contain harmful ingredients.for Kids only(same prevention effect)
SLS Sunscreen: Eco-friendly sunscreen developed by an Australian lifesaving organization

Click here for jellyfish prevention cream/sunscreen


There are many types of underwater masks, but they differ in size, material and shape of the part that touches the face.

If it does not fit your face, water will easily enter and it will be difficult to use, so be careful when purchasing.

Choose a silicone material for the part that touches your face.
​ We recommend a lens with a small inner volume and a short distance between the face and the lens because it has a wide field of view and is easy to clear the mask.

🔹the underwater maskhere

KS_3073_smoke 2.jpg

Choose a snorkel that is easy to hold and easy to clear when water comes in.

 GULL Layla Stable(for women)canal stable(for men) is recommended.

Cheap ones are fine, but those with a valve at the top to prevent water from entering are only for playing on the surface of the water.It cannot be used for skin diving as there is a risk of suffocation when diving underwater.

🔹Click here for snorkel


It is important to choose fins that match your leg strength, swimming ability, and level.
We recommend the full-foot type, which is not a strap type, and is made of rubber.
Plastic fins and diving fins are not recommended as they make it difficult to swim on the surface and make you tired.


GULL Emden: small fins for beginners

Gull Mew: Best-selling fins that can be used by everyone from beginners to advanced users!

GULL Warp Fin: For intermediate to advanced students who have graduated from MU.
​ *Super Mew is for scuba diving and difficult to use for dolphin swimming.

Gull Barracuda: The world's highest grade rubber fins boasting excellent propulsion and ease of use for intermediate to advanced players.

🔹Click here for fins


for wearing finsfin socksorboots.

​Increases the feeling of close contact with the fins and protects your feet from slippage and injuries. It also retains heat.

🔹Click here for boots and socks

スクリーンショット 2022-06-21 16.30.08 4.jpeg

Wetsuits play an important role in retaining heat and ensuring buoyancy. (It will replace the life jacket when I say yes)

Depending on the material of the fabric, the price may be on the low side, but high-quality fabrics have the advantage of being warm and elastic and easy to move around in. There is a marked difference in heat retention and mobility between ready-made sizes and custom-made ones that are made to fit your measurements.

When purchasing, please consult us to choose a solid one.

For skin diving in the summer when the water temperature is high or at a resortTupperware (jacket type), which is only for the upper body, is fine.

Weight when wearing a wet suit (weight)is required.

The amount of weight varies from person to person, so be sure to keep track of it during practice.

🔹Click here for Rashguard and Inner

🔹Click here for wetsuits

swim with wild dolphins

Mikurashima Dolphin Swim Tour 


30 years of swimming with dolphins!Held about 30 times a year!
Leave the Mikurashima tour to DIVE KIDS, a dolphin swim specialist!

Click here for information on ​Mikurashima Dolphin Swim Tour

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