Kyomu Senshi Miroku
Expunged Chronicle of Miroku ／ Kyomu Senshi MIROKU ／ 虚无战史 ／ 虚無戦史MIROKU ／ 虚無戦史Miroku ／ 虚無戦史ＭＩＲＯＫＵ
Description
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. (Source: The Anime Encyclopedia)