Release: 1989

Status: Completed

Type: OVA

Genres: Action, Fantasy, Historical, Mythology, Samurai, Sci-fi, Supernatural

Other Name: 虚無戦史ＭＩＲＯＫＵ

Total Episodes: 6

Synopsis: A psychic ninja fantasy suggesting that the assassins did not die out during the Sengoku era but burrowed under Japan, where they fought a new war against the alien occupants of a crashed spaceship that has lain undisturbed for several millennia.