The Amakasu clan was a minor Japanese clan of the Sengoku period.
Amakasu may also refer to:
"Akamasu retainer clan", a fictional group in Total War: Shogun 2 "Akamasu clan", a fictional group of non-player characters in role-playing games Amakasu incident, in which Japanese soldiers beat three high-profile anarchists after the Great Kanto earthquake in 1923