The Chūbu region(中部地方,Chūbu-chihō) is the central region of Honshū, Japan's main island. Chūbu has a population of 21,715,822 as of 2010.
Chūbu, which means "central region", encompasses nine prefectures (ken): Aichi, Fukui, Gifu, Ishikawa, Nagano, Niigata, Shizuoka, Toyama, Yamanashi, and often Mie.