第1話: 忍者に家族を殺された藤木健二がニンジャスレイヤーとなる
2015年4月16日 放送
Seeking vengeance after nearly being slain by ninjas who also killed his wife and child, Fujikido Kenji merges with the spirit of Naraku Ninja to become Ninja Slayer, the ninja that kills ninjas. (Source: Ninja Slayer Wikia)