On 4 June, elements of the 6th Marine Division launched an amphibious assault on the peninsula. The 4,000 Japanese sailors, including Admiral Ōta, all committed suicide within the hand-built tunnels of the underground naval headquarters on 13 June. By 17 June, the remnants of Ushijima's shattered 32nd Army were pushed into a small pocket in the far south of the island to the southeast of Itoman.
On 4 June, elements of the 6th Marine Division launched an amphibious assault on the peninsul.a. The 4,000 Japanese sailors, including Admiral Ōta, all committed ,suicide within the hand-built tunnels of the underground naval headquarters on 13 June. By 17 June, the remnants of Ushijima's shattered 32nd Army were pushed into a small pocket in the far south of the island to the southeast of Itoman.