Dive centre · Minamiuwa-gun · Japan
4.294 Google reviews西海観光船
Explore the coral-rich waters of Ainan-cho aboard a glass-bottom boat or experience the unique Sea Walker activity on the deserted island of Kashima.
What sets this centre apart
- 30 years of marine conservation experience
- Green Fins certified for environmental protection
- Guides include instructors from the national park
- Glass-bottom boat for easy coral observation
- Unique Sea Walker activity on Kashima Island
- Located within a protected national park
- Diving licence courses available June to October

西海観光船 about the centre
Nishiumi-Kankousen is situated in the heart of the national park in Minamiuwa-gun, Ehime. For three decades, the centre has operated as a professional marine specialist, focusing heavily on the protection and observation of the local coral reefs and diverse marine life.
The centre offers a variety of ways to experience the underwater world, from traditional scuba diving to more accessible activities like Sea Walker and snorkeling. Whether you are looking to observe the reef from a glass-bottom boat or want to explore the seabed on foot, the location provides direct access to a rich marine environment.
The club and its team
The team includes instructors from the national park who guide visitors through the local waters. Their long-standing commitment to the area is evidenced by their 30 years of involvement in marine conservation, including regular beach clean-ups and coral protection initiatives.
As a Green Fins certified centre, the staff operates with a high standard of environmental responsibility. All instruction and guiding are conducted in Japanese, providing a local and authentic perspective on the ecosystem.
The centre at a glance
- Affiliation
- SSI
- Certification level
- Instructor Training Center
- Languages spoken
- Japanese
- Website available in
- Japanese
- Management
- Japanese
- Dive schedule
- 8h45 - 17h00 (variable selon la saison)
- Boats
- bateau avec fond en verre (glass bottom boat) · 15 personnes
- Equipment rental
- location de matériel disponible (masque, tuba, palmes, etc.)
- Night diving
- No
- On board
- fond en verre pour observer les coraux et la vie marine
- Access and transfers
- located in Minamiuwa-gun, Ainan-cho, Ehime
- Phone
- +81 895-82-0280
- Address
- 1599 Funakoshi, Ainan, Minamiuwa District, Ehime 798-4205, Japan
- Official website
- nishiumi.info ↗
Courses on offer
The centre provides opportunities to obtain diving licences, with these courses being available from June to October. These programmes are designed to introduce new divers to the underwater environment through structured training.
In addition to licence acquisition, the centre supports various marine activities that allow you to build confidence in the water, such as Sea Walker and guided snorkeling tours.
The boats
The centre operates a glass-bottom boat designed specifically for observing the coral reefs and marine life without getting wet. This vessel allows for close-up views of the underwater environment, making it an ideal option for those interested in marine biology or those who prefer not to dive.
The boat has a capacity for 15 people, making it suitable for small groups or families looking to explore the coastal waters of the national park.
Equipment and gases
For those choosing to participate in water activities, a range of equipment is available for hire, including masks, snorkels, and fins. This allows divers and snorkelers to arrive with minimal kit if they prefer not to carry their own.
Full equipment hire is available to ensure you have everything required for your session on the water.
Dive sites with 西海観光船
Kashima Island is a deserted island that serves as a primary location for marine activities. It is a versatile spot suitable for all levels, offering environments for snorkeling, SUP, and the unique Sea Walker experience amidst a rich backdrop of fish and coral.
The surrounding waters of the national park provide various points for observing the reef, with the biodiversity being a key draw for those visiting the Ehime coastline.
And some of the dive sites the centre runs.
Marine life around Minamiuwa-gun
The marine life in this area is defined by its vibrant coral ecosystems. You will find a diverse array of corals and numerous fish species that inhabit the reef structures, creating a busy and colourful underwater landscape.
Macro life and smaller inhabitants are abundant throughout the reefs. The area is known for its variety of fish that rely on the coral for shelter and food, providing plenty of interest for both snorkelers and divers.
Specific seasonal highlights include the period from mid-July to mid-August, which is an ideal time to visit the waters around Kashima Island to observe the local fauna in its most active state.
Diving conditions
The local environment is subject to seasonal changes, with summer being the recommended period for snorkeling activities. Divers should be mindful of the local conditions, as currents and swell can become more pronounced after 16:00.
Environmental maintenance, such as water cleaning works, can occur in August, which may affect local activities during that month.
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