Battle Royale High School
Battle Royal High School - Fight to the End! [English Dubbed Anime] (OVA - 1987)
When the school Karate club's star fighter quits and decides to go pro, he unwittingly fulfills an ancient interdimensional prophecy and becomes demon king of his dimension. Soon his high school becomes a battleground for demon slaying samurai, interplanetary law enforcement, and even his own traitorous demon...