The father of Gyoubu Kasumi who appears only in the anime. Under the command of the Kouga elder, Renbu was ordered to hunt down and eliminate any Iga who escaped Nobunaga's assault, but was stopped by Lord Danjou Kouga when he attempted to kill Ogen in the forests behind Tsubagakure. Despite being a ruthless combatant, Renbu's deepest desire was for his son to live a life free of conflict and bloodshed and eventually became a supporter of Danjou's desire to build a lasting peace with the Iga. Sent by Danjou to meet with them as a representative, Renbu and his companions were ambushed by an Iga squad who sought revenge for the attack he led on their clan. Renbu was mortally wounded during the fight and his final words to Gyoubu before he died was to never pity any ninja.