Small island to the west of Mesegon Island, at the southern edge of Truk Lagoon. To the west is the large deep water passage, Otta Pass.

During the war, a six man detachment of the 41st Naval Guard Force was stationed on the island, to man two 15cm coastal defense guns and a 75mm searchlight and light anti-aircraft guns. Also, barracks, a sound locator and generator. The island was surrounded by 145 navy beach mines placed 40-60m from shore in 6m intervals.