 The nephew and adopted son of Hattori Hanzou the 4th (his birth father was Hattori Hanzou the 2nd).Kyohachiro was charged by Hanzou to monitor the duel between Kouga and Iga and then report the results to him and Lord Ieyasu.Although he initially has his subordinates witness the battles, following Gennosuke's victory over the Iga at Tsubagakure, Kyohachiro eventually decides that the Kouga/Iga duel is something he has to see for himself personally.