Onuma (surname)

Onuma, Ōnuma or Oonuma (written: 大沼 lit. "big swamp", おおぬま in hiragana) is a Japanese surname. Notable people with the surname include:


 * Ayako Ōnuma (大沼 綾子), Japanese volleyball player
 * Koji Onuma (大沼 幸二), Japanese baseball player
 * Shin Ōnuma (大沼 心), Japanese animation and theatre director

Onuma (written: 小沼 lit. "small swamp", おぬま in hiragana) is a separate Japanese surname, though both may be transliterated the same way. Notable people with the surname include:


 * Tan Onuma (小沼 丹), Japanese writer