Yamanashi, Japan

Yamanashi Prefecture (山梨県) is a region of Japan adjacent to Kamakura and Tokyo. It corresponds to the real-world Yamanashi Prefecture. Yamanashi is often known simply as Koshu (甲州), which is a historical name for the same area. It is also sometimes known as Kai (甲斐).

Yamanashi was overrun by the Huge and largely abandoned during the conflict known as the Koshu Evacuation; some of the former population now lives in evacuation zones. The Garden of Kaiseizan continues to operate within the occupied territory.