Shin Ōnuma (大沼 心 Ōnuma Shin?, b. March 8, 1976) is a Japanese animation and theatre director. He has also provided key animation for many anime. Most prominently he has directed Ef: A Tale of Memories. and assisted Akiyuki Shinbo in directing three anime by Shaft: Pani Poni Dash!, Negima!?, Natsu no Arashi!.