, also known as , is a member of the Juppongatana and a cunning elder who manipulates the giant Fuji. Saizuchi's talents lie not in battle-abilities, but his proficient use of words. Having taken Fuji in after he was nearly killed, Saizuchi reminds Fuji that he has to repay him. During the Juppongatana's attack of Aoi-Ya, Saizuchi attempts to destroy the morale of the Oniwabanshū by giving a speech as to why it is impossible for them to defeat Fuji and himself. Saizuchi is knocked unconscious when Fuji's left arm falls on him upon being defeated by Hiko Seijūrō. Pardoned for his crimes, Saizuchi uses his gifts of persuasion for the Foreign Ministry in secret negotiations.
