The main instructor and senior at Kogan-Ryuu.   He showed great loyalty and obedience by standing still while his master, Iwamoto Kogan, took blows at him in blind rage, destroying most of teeth. Every summer he travels to other dojos challenging them and reminding them how fearsome the Kogan Ryuu style really is. 

The story begins in 1629 Shizuoka during Tokugawa Tadanaga's rule. The daimyo staged a tournament where the participants fought with real steel Japanese swords rather than bokken, against his vassals' strong objection. The story revolves around the first match between the one-armed swordsman Fujiki Gennosuke and the blind samurai Irako Seigen and deals with the circumstances that led the two to participate in Tokugawa's tournament. 
(Source: Wikipedia)

Two damaged warriors wear the scars of a twisted and violent past. Bitter rivals for the secrets of their master's sword and the right to his daughter, these samurai inflict wounds on each other that would destroy lesser men. The final chapter of their saga unfolds within a brutal samurai tournament, a gruesome contest arranged to satisfy the bloodlust of a cruel tyrant overlord. 
 
The disfigured legends of the blade must summon the strength for one last battle - a final lesson in the artistry of violence where nothing is more beautiful than the kill. 
 
(Source: Funimation)

[Wiki (jp)](https://ja.wikipedia.org/wiki/屋良有作)

Gonzaemon Ushimata