Located near the center of the Japanese main island of Honshu, Aichi Prefecture faces the Ise and Mikawa Bays to the south and borders Shizuoka to the east, Nagano to the northeast, Gifu to the north, and Mie to the west.
On March 20, 2006, the towns of Shikatsu and Nishiharu from NishikasugaiDistrict merged to form the new city of Kitanagoya.
As of 2001 Aichi Prefecture's population was 50.03% male and 49.97% female.