At some point when Urusai learned how to use the Summoning Technique, Kinken was one of the first to accept kangaroos do the contract with him. Kinken always been supremely confident of himself and always believed he could solve all his problems, which certainly attracted the interest of Urusai for him. One of his favorite hobbies is to display his golden boxing gloves or his golden belt. Even often being displayed and arrogant, Urusai and Kinken are good friends. During the Second Shinobi World War, Kinken was one of kangaroos that Urusai summoned in his fight against Jiraiya.