Jin (仁 (ジン)^?) is a 20-year-old man who wields a Katana, Wakizashi and spent the majority of his life training in kenjutsu dojos. Unlike Mugen, it is legal for him to carry a daisho, as he is of thesamurai class. His swords have a lightning and twin-eyed design on the tsuba. He wears traditional hakama and gi in indigo blue patterned with a white diamond kamon made up of four small white diamonds. His kamon closely resembles that of the great Takeda Clan, leading to speculation that his family origins may be of nobility.^[3] He wears glasses but Fuu states that they are “for show”, indicating Jin wears them as an accessory rather than actually needing them.

When he was eighteen, he was to be assassinated in his sleep by his sensei, Mariya Enshirou, at Kariya Kagetoki’s insistence. However, Jin killed Mariya in self-defense and fled the dojo, becoming aronin. His death is sought by former classmates and other fame-seekers. Mujushin was a real sword-fighting dojo, and Mariya Enshirou is known to have been the third master — although the circumstances of his death are unclear.^[4]

Jin is highly devoted to upholding Bushido and is in fact named after jin (justice), one of the seven samurai virtues. Jin is usually taciturn and unusually collected. He is an extremely skilled swordsman, using swift, refined, orthodox moves of the Mujushin Kenjutsu discipline, making him the perfect foil for Mugen.

In the last episode of the series, he confesses to both Fuu and Kariya that he has spent his entire life with no devotion to anyone. He lived only for his sword and no master; saying that the lords of that time have no sense of honor, only caring about self-preservation. But he seems to change during his travels with Fuu and Mugen, saying that they are his “first friends.”

His seiyū is Ginpei Sato. His voice actor in the English version is Kirk Thornton.