Kumejima is one of Japan’s most promising destinations for encounters with reef mantas: seasonal aggregations draw these gentle giants to the island’s cleaning stations, where they glide effortlessly above the reef, often allowing for prolonged and unforgettable encourters. It offers a rare opportunity not just to see mantas, but to truly understand their behavior in a natural and relatively undisturbed environment.

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Join a small group of just 6 divers, working closely with the newly established Japan Manta Project leader, for a very engaging and immersive expedition.

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Beyond the mantas, Kumejima’s underwater landscape sets the scene for a one of a kind destination: volcanic topography has shaped dramatic drop-offs, channels, and reef structures that mantas frequent, while consistently clear blue water—often with visibility exceeding 20–30 meters—sets the perfect diving conditions.

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Experience a rich ecosystem, healthy coral reefs support a wide diversity of marine life, from schools of reef fish to macro species hidden in sandy patches and crevices. The influence of the Kuroshio Current brings nutrient-rich water and occasional pelagic visit, adding an element of unpredictability to every dive.

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What truly sets Kumejima apart is its sense of remoteness and focus. Compared to

more frequented areas of Okinawa, dive sites here remain uncrowded, allowing for

more respectful wildlife interactions and a deeper connection to the environment. This makes Kumejima an ideal setting for research, conservation, and intentional diving centered around manta rays.