Voiced by: Tohru Kusano (Japanese), Duncan Brannan (English)
He initially fought side by side in the Great War with Kanbei, and is often referred to as "Kanbei's old wife." ("Mate" in the English series) He temporarily leaves behind his successful post-war business at the Firefly Inn, and with it, his beautiful girlfriend/fiance, to join Kanbei in battle once again. He has a prosthetic left hand which has a grappling hook capability with his index finger. In combat he uses a type of spear; the only samurai not using a sword. This is probably a reference to his using a spear mainly during the final battle in the original movie (though normally he carried a sword). His girlfriend, Yukino, has nicknamed him Momotaro, from the traditional Japanese tale, because she found him, badly injured after a battle, floating down a river inside a capsule reminiscent of a peach. He is the fourth samurai.