Independent overview of Nishikawana's fish richness, mixed terrain, and seasonal visibility.
Easy Nishikawana fish-reef dive with short boat access.
Easy Nishikawana fish-reef dive with short boat access.
Gyosho is the easier fish-reef side of Nishikawana: a short boat hop to a shallow artificial reef built from concrete blocks, rocky patches, and sandy edges. It is the softer option in a site family that can run harder on the main points, so it fits training dives, guided fun dives, and low-stress days when you want the fish density without the full-flow challenge. Plan on boat handling, line work, and a route that stays simple unless the team chooses to stretch toward the main point.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
8m - 20m
Depth Note
The fish reef sits around the shallow end of the Nishikawana system, with broader site routes reaching deeper toward the main point and C buoy when conditions allow.
Best Season
Winter for the clearest water; autumn also tends to stay productive.
Typical Conditions
Artificial reef, mixed rock and sand, short boat access, and a gentler feel than the stronger-flow main Nishikawana points.
Site conditions, restrictions, and access requirements.
Site Conditions
Safety Notes
Stay with the operator's buoy or line plan and treat the broader Nishikawana area as current-sensitive even when Gyosho itself is the easier option.
Access Restrictions
Use the local boat service and follow the operator's entry and exit instructions; this is not a self-directed shore entry site.
Legal Notes
Follow local harbor, buoy, and dive-service rules for the Tateyama and Nishikawana operating area.
Community notes to help plan your visit.
Scuba Diving
This is the easier-handling side of the Nishikawana system, useful for training, guided fun dives, and relaxed fish-reef sessions.
Freediving
Not a primary freedive site; boat access and a structured reef layout make scuba the better fit.
Snorkeling
Snorkeling is not the main use case here; the site is better suited to scuba from the boat.
Species commonly reported at this site, with direct links into their wildlife guides.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Independent overview of Nishikawana's fish richness, mixed terrain, and seasonal visibility.
City tourism listing for the Nishikawana Ocean Park dive center and its support services.
Nishikawana operator page with the Gyosho fish reef, shallow max depth, and C-buoy drift option.
Know this site? Improve Spot Details.

Jogashima: bridge-access island diving with walls and macro life

Beach Bum is a shore-entry training pool near Misakiguchi.

Zushi is a boat-access offshore pinnacle with soft-coral walls.

Aki no Hama is a beach-entry macro dive point on Izu Oshima.

Hatsushima Island is a ferry-reached dive base with beach and boat points.