Aogashima (青ヶ島) is a volcanic Japanese island in the Philippine Sea. The island is administered by Tokyo and located approximately 358 kilometres (222 mi) south of Tokyo and 64 kilometres (40 mi) south of Hachijō-jima. It is the southernmost and most isolated inhabited island of the Izu archipelago.
The village of Aogashima administers the island under Hachijō Subprefecture of Tokyo Metropolis. The island’s area is 8.75 km2 (3.38 sq mi) and, as of 2014, its population is 170. Aogashima is also within the boundaries of the Fuji-Hakone-Izu National Park.