Teenage Mutant Ninja Turtles / Usagi Yojimbo: Wherewhen #1

In a future timeline, Usagi has joined Lord Noriyuki’s army and is about to march on Lord Hikiji’s forces when he hears of a Kappa menacing villagers. While Usagi and Tomoe kill the Kappa, the Teenage Mutant Ninja Turtles arrive, having pursued Dr. Wherewhen into their past. Jotaro and Yukichi mistake the Turtles for the Kappa.