Toshima

Toshima is a small town in Kumage District, Japan. It sits inland at a modest elevation and isn’t a traditional diving hub. Nearby freshwater options include Lake Hinuma, which can be of interest to divers seeking training or freshwater quarry dives, but there are no major coastal dive sites directly in Toshima. The closest diving activity tends to be centered in larger coastal cities along the North Pacific and nearby prefectures, with the local ecosystem and sea access varying by season.