Kozushima Island
HiddenOutside Tokyo · Kozushima Village
Kōzushima is a small, remote Izu island of clear water, white-sand coves, free open-air seaside onsen and some of the darkest night skies near Tokyo. It's reached by a 3–4 hour high-speed ferry or a short flight — not a day trip, so plan an overnight. Best from late spring through summer for swimming and stargazing.
⚠️ Hours & schedule subject to change.
Why people go
KidsElderlyNo hidden chargesNo drink requiredNo table chargeParking available
Tags
IslandBeachOnsen
Highlights
Clear coves & seaside onsenDark-sky stargazingOvernight only (ferry/flight)~3–4h ferry from Tokyo
Hours detail
Closed onDaily
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Location
Photo: Unsplash / Ice Tea