Hachijō Subprefecture (八丈支庁) is a subprefecture of Tokyo Metropolis, Japan. The organization of government belongs to the Tokyo Metropolitan Government Bureau Of General Affairs.

Geography

The subprefecture has an area of 78.6 square km. It is located within the Izu Islands and is 200km away from Mainland Japan.

Municipalities

Other Islands

Additionally, Hachijō includes the four southernmost Izu Islands, which are uninhabited. These islands currently do not belong to any municipality; both Hachijō and Aogashima claim administrative rights. From north to south, the islands are: Among the islands of the subprefecture, only Hachijōjima and Aogashima are inhabited.

Demographics

In 2023, Hachijō Subprefecture had a population of 8,790. The village of Aogashima is the least populated municipality in all of Japan, with only 169 residents

Language

The Hachijō language, also called Shima Kotoba, is spoken exclusively on the two main islands. It is an endangered language, with 0 native speakers being children or young adults.