Ninja Slayer Kills Anime Details and Episodes Ninja... Ninja were... merciless demi-gods, ruling Japan with their karate in the age of ninja tranquility. But, "some" committed a forbidden form of… Series info · Watch free · Trending anime · Airing schedule FormatMangaStatusFinishedCountryJapan Action · Sci-Fi Super Power Ninja Slayer Series (Source) · Ninja Slayer (Alternative) · Ninja Slayer: Glamorous Killers (Alternative) GetBackers