[3] Both villages of Kita Iwo Jima became part of the newly created Iwojima municipality in 1940: Following World War II, the islands were administered by the United States.

Governor Koike also said at a regular press conference that day, "(The new model plan) is an effective measure to secure the air routes necessary to protect the lives of the islanders.

[citation needed] Per Japanese census data,[5] the population of Ogasawara has remained relatively steady in recent decades.

Ogasawara Village operates the islands' public elementary and junior high schools.

[6] The Tokyo Metropolitan Government Board of Education operates Ogasawara High School on Chichi-jima.