Nagoya Prefecture was renamed to Aichi Prefecture in April of 1872, and was united with Nukata Prefecture on November 27 of the same year.
Located near the center of the Japanese main island of Honshū, 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.
As of 2001 Aichi Prefecture's population was 50.03% male and 49.97% female.