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 DetailsFormatMangaStatusFinishedCountryJapan GenresActionSci-Fi TagsSuper Power RelatedNinja Slayer Series (Source)Ninja Slayer (Alternative)Ninja Slayer: Glamorous Killers (Alternative) RecommendationsGetBackers