Historically, the cities of
Ōme,
Fussa,
Hamura, and
Akiruno were parts of Nishitama District but these were broken off from the district after they were elevated to city status.
Education
Each of the towns and villages operates separate public elementary and junior high school systems.
July 22, 1878:
Tama District, which it had long been part of former
Musashi Province, was divided into four parts:
Higashitama (Eastern Tama),
Kitatama (Northern Tama),
Minamitama (Southern Tama) and Nishitama (Western Tama). Nishitama District had 1 town and 93 village areas.
April 1, 1889: The new legislation, Nishitama District had 2 towns and 30 villages areas.