Ōtsuki (大月 or 大槻) is a Japanese surname. Alternative transliterations include Otsuki, Ootsuki and Ohtsuki. Notable people with the surname include:
, Japanese lexicographer, linguist, and historian , Swedish Classical musical pianist , Japanese kickboxer , Japanese AV actress and idol singer , Japanese actor , Japanese football player and manager , was the second wife of Sun Yat-sen , Japanese singer , Japanese rock musician , Japanese singer , a semi-regular cast on Ultraman Leo , Japanese football player , the perpetrator of the Hikari Parent-child Murder Incident , founder of the third largest independent Japanese church, Holy Ecclesia of Jesus , Japanese football player and manager , Japanese-German actor , Japanese footballer
Fictional characters , a character from Umineko When They Cry , a character from Senryu Girl , a character from Kaiji and Mr. Tonegawa: Middle Management Blues , a character from The Idolmaster