About this spot
Sentan sits near the historic Izu Osezaki Lighthouse on Japan's Izu Peninsula, a region famous for consistent diving conditions and rich marine life. The site falls within Fuji-Hakone-Izu National Park, giving it protected status and ensuring good site management. With 12 documented species observations and community video documentation, Sentan draws divers curious about Japan's temperate waters and the unique ecosystems around this iconic lighthouse location. The Izu Peninsula has long been a hub for Japanese diving culture. Sentan's position near Osezaki makes it accessible and notable within the region's diving network. The protected park status means the site maintains ecological integrity and follows conservation guidelines. Local diving communities have documented visits and species sightings, building a record of what divers can expect. Year-round access means you can plan trips flexibly. The site's inclusion in a national park suggests scenic value beyond just underwater appeal—the lighthouse and coastal landscape add character to any dive trip. Whether you're exploring temperate Japanese diving or seeking reliable access near Tokyo, Sentan offers a combination of marine life, protection, and established community knowledge.
📖 Guide: Diving in Japan: 42 Sites from Sharks to Stone Monuments
Trip essentials
Everything you need before you pack — checklist, sun, logistics.
Trip checklist
- 🛂 Visa-free or visa-on-arrival
- 📜 C-card + dive insurance (DAN)
- 📔 Dive logbook
- 🧴 Reef-safe sunscreen SPF 50+
- 🔌 Plug type A/B · 100V adapter
- 💊 Seasickness meds + ear drops
- 📱 Offline maps + emergency contact
Quick facts
- 🌓 Moon First quarter · 47%
- GPS
› Sustainability disclosures
FAQ
›When is the best time to dive Sentan?
Sentan is diveable year-round, so timing depends on your schedule and tolerance for water temperature. Check community trip reports and local operators for seasonal conditions and visibility trends.
›What are the depth and difficulty levels?
Specific depth and difficulty data for Sentan are not documented in available records. Contact local dive operators near Izu Osezaki for detailed site profiles and current conditions before booking.
›What marine life will I see?
Twelve species have been documented at Sentan. Community videos provide visual reference for what divers have encountered. For a complete species list, review local dive guides and sighting reports from the diving community.
›How do I access Sentan and are permits required?
Sentan lies within Fuji-Hakone-Izu National Park, a protected marine area. Check with park authorities and local dive operators about any permits, access restrictions, or guidelines required for diving within the protected zone.
