Tenzen Yakushiji (薬師寺 天膳, Yakushiji Tenzen) is a member of the Iga Tsubagakure clan and one of the ten ninja picked by Ogen to participate in the war against the Kouga. He is second-in-command after Ogen and is able to wrestle control of the Iga away from Oboro following Ogen's death to become Iga's de facto leader. He is the main antagonist of the series.