Kōji Ryōshi (猟師こうじ, Ryōshi Kōji) is a Jōnin from Amegakure who has become experienced combatant after surviving countless missions. Additionally, he is a Fourth Tsurugi (四代目剣, Yondaime Tsurugi) within the Combat Unit (交戦部隊, Kōsen-butai) of the international peacekeeping organization SENSHI. Within his unit he serves both in the Vanguard Division (前衛師団, Zen'ei-shidan) and in Hiyakō, a team incorporating members from several divisions for the purpose of handling advanced objectives.