Ninja Slayer From Animation

Neo-Saitama in Flames, Part 2: Darkninja Returns (1x22)

Air date: Sep 10, 2015

Ninja Slayer and Darkninja fight one-on-one. After Laomoto is called away to appear in a live broadcast, two other ninjas appear and encourage Darkninja to take on a different task in Kyoto, saying it is his destiny.