Beach & Waterfront · Tateyama
Okinoshima Island (Tateyama) 沖ノ島
Small wooded island joined to the Tateyama shore by a sandbar, popular for swimming, rock-pooling and some of Boso's easiest snorkelling.
HoursOpen at all times
PriceFree
Getting thereTateyama Station (JR Uchibo Line), 12 min by bus then 25 min walk
Time needed2-4 hours
Best timeSummer for swimming and snorkelling
AddressFujimi, Tateyama, Chiba (Okinoshima Park)
About
Okinoshima is a city park in Tateyama Bay, reached on foot along a sandbar. Visitors set up on the sand on either side of the causeway, explore rock pools around the island and snorkel among small fish, which is rare on the Boso coast. A short trail circles the wooded island.
Highlights
- Island reached on foot across a sandbar
- Snorkelling among small fish
- Rock pools for children
- Coastal forest walk
Tips
- There are no toilets on the island; use the temporary toilets on the approach
- Barbecues and open fires are prohibited in the park
Open in Google Maps · Info checked 2026-10-10
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