List of prime ministers of Japan by home prefecture

This is a list of prime ministers of Japan by home prefecture. This is based on prefectures where each prime ministers were born and not based on prefectures primarily affiliated or most closely associated with the prime ministers due to residence, professional career, or electoral history.

This list includes Provinces, the former administrative divisions used from the 600s to 1882.

Birthplaces
Twelve provinces and twenty-one prefectures, including 1 metropolis (Tokyo) have the distinction of being the birthplace of a prime minister.

Born on 1 April 1870, Hamaguchi Osachi was the first prime minister born after the establishment of the Empire of Japan.

Born on 6 December 1948, Yoshihide Suga was the first prime minister born after the establishment of the post-war state of Japan.

The number of prime ministers per provinces and prefectures in which they were born are:
 * One: Akita Prefecture, Chiba Prefecture, Okayama Prefecture, Ōita Prefecture, Hiroshima Prefecture, Aichi Prefecture, Shiga Prefecture, Shimane Prefecture, Kagawa Prefecture, Tokushima Prefecture, Niigata Prefecture, Kyoto Prefecture, Tochigi Prefecture, Ishikawa Prefecture, Izumi Province, Mimasaka Province, Echizen Province, Bitchū Province, Nara Province, Tosa Province, Izumo Province, Owari Province, Higo Province, Aki Province, Musashi Province, Yamashiro Province, Hizen Province, Suō Province
 * Two: Yamaguchi Prefecture, Fukuoka Prefecture, Ishikawa Prefecture, Iwate Prefecture, Mutsu Province
 * Three: Tokyo (Metropolis), Satsuma Province
 * Four: Gunma Prefecture, Kanagawa Prefecture, Nagato Province
 * Eight: Tokyo (Prefecture)