- Source: Suganuma
Suganuma (Japanese: 菅沼) is a Japanese surname. Notable people with the surname include:
Eiji Suganuma (菅沼 栄治), male Japanese animation director
Hisayoshi Suganuma (菅沼 久義, born 1978), Japanese male voice actor
Michiko Suganuma (菅沼 三千子, born 1940), Kamakura-bori artist from Japan
Minoru Suganuma (菅沼 実, born 1985), Japanese football player
Morito Suganuma (菅沼 守人, born 1942), Japanese aikido teacher holding the rank of 8th dan in the Aikikai
Suganuma Sadamichi (菅沼 貞道), samurai commander in Japan's Sengoku period
Suganuma Sadamitsu (菅沼 定盈, 1542–1604), samurai commander of the Suganuma clan during Japan's Sengoku period