See all Things to do in Oshima Oshima for: Adventure, Food And Dining, Art And Culture, Nightlife, Spa, History, First Timers, Family, Romance, Shopping Kobohama About There are several beaches on Oshima, all sporting black sand due to the basaltic origin of the island. If you are staying in Motomachi, the most conveniently located beach is Kobohama(弘法浜) near the port. Add to Wish List
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