South of Tokyo in the warm Kuroshio Current, Mikomoto Island's offshore pinnacles funnel scalloped hammerhead schools into drift paths that have made this one of Japan's most celebrated shark dives. Strong currents and deep profiles demand experience, but summer visibility and shark numbers peak together. July and August deliver the most reliable daily hammerhead action before autumn typhoons disrupt schedules.
South of Tokyo in the warm Kuroshio Current, Mikomoto Island's offshore pinnacles funnel scalloped hammerhead schools into drift paths that have made this one of Japan's most celebrated shark dives. Strong currents and deep profiles demand experience, but summer visibility and shark numbers peak together. July and August deliver the most reliable daily hammerhead action before autumn typhoons disrupt schedules.
Up to 92% sighting chance in Mikomoto Island (Japan). Best months: August, July, September.
June through October is the operating season, with July and August as the peak months for scalloped hammerhead schools in the Kuroshio Current.
The warm Kuroshio can push drift speeds above 2 knots. Operators cancel or relocate when current exceeds safe limits.
Day trips run from ports on the Izu Peninsula, roughly three to four hours by road and boat. Expect 25,000 to 40,000 JPY per two-tank day (2026 prices).
Advanced open water and documented drift diving experience are typically required by Mikomoto operators.
Offshore pinnacles funnel hammerhead schools into predictable drift paths, making this Japan's most celebrated shark dive site.
