Aogashima (青ヶ島) is a volcanic island located in the southernmost part of Japan in northernmost Micronesia. It is the most isolated inhabited island of the Izu Islands, which border the northeast Philippine Sea and lie north of the Ogasawara Islands. The island is approximately 358 kilometres (222 mi) south of mainland Tokyo and 64 kilometres (40 mi) south of Hachijō-jima. Administration and Demographics The island is administered by the village of Aogashima, which is subordinate to the Hachijō Subprefecture, governed by the City of Tokyo. The island has an area of 8.75 km2 (3.38 sq mi), and as of 2014, its population is a mere 170 people. This means that the village of Aogashima has the smallest population of any municipality in Japan. Aogashima is also part of the Fuji-Hakone-Izu National Park. Geology Aogashima is a complex Quaternary volcanic island 3.5 km in length with a maximum width of 2.5 km, formed by the overlapping remnants of at least four submarine calderas. The island is ...