Minamibōsō is in the southern portion of Chiba Prefecture, near the southern tip of the Bōsō Peninsula, facing the Pacific Ocean to the east and south, and the entrance to Tokyo Bay on the west.
Minamibōsō is in the southern portion of Chiba Prefecture, near the southern tip of the Bōsō Peninsula. It is surrounded by water on three sides facing the Pacific Ocean to the east and south, and the entrance to Tokyo Bay on the west.