Johakkyu stands as the ancient nemesis of the 108 legendary warriors at the heart of the narrative's core conflict. Reborn in the modern age as Masaru Oshita, he commands the Koryukai crime syndicate ruling Tokyo's underworld. In this incarnation, Oshita emerges as the central antagonist confronting the reincarnated heroes banded against his criminal empire. Their final battle culminates in a duel between Johakkyu's current form and Takateru Suga, the modern rebirth of the warrior Soko Kohogi. Supernatural and spectral in nature, Johakkyu bears the official classification tag "Ghost."