Aichi Prefecture is a prefecture of Japan located in the Chūbu region of Honshū.: 11, 126  Aichi Prefecture has a population of 7,552,873 and a geographic area of 5,172.92 square kilometres with a population density of 1,460 inhabitants per square kilometre. Aichi Prefecture borders Mie Prefecture to the west, Gifu Prefecture and Nagano Prefecture to the north, and Shizuoka Prefecture to the east.