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.
Synonyms: 虚無戦史ＭＩＲＯＫＵ
Status: Finished Airing
Country: Japanese
Released: 1989
Season: OVA
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