Kazuto was a member of Tenka's pack who formed a close friendship with Ogasawara Gennai. Upon Gennai's defect, he left with his friend and two others to help in the fight against Kurohabaki Masamune. Gennai in turn sends Shiro to spy Kurohabaki Clan, but he was taken prisoner and taken to Masamune tortured his subjects.
Gennai worried when Shiro does not return, and leaves with a small army to look for him. Kazuto in turn, was sent to fetch reinforcements. However, Tenka decides to leave his troops to fend for themselves and away from the desk. Kazuto cries shocked and runs back to help Gennai and others. Gennai gets the last minute to rescue Shiro and they return Tenka, but Tenka is unhappy with the failure to send a team and try to determine the Gennai to kill Shiro. However, Gennai does not agree and understand that Tenka has repeatedly sent his failed group to their deaths.
Kazuto remains by Gennai's side as they travel to Ou to fight the invading bears. When it rains, they find the cottage and Shion inside. In the morning, they discuss and eating together-found the boar's body from the river. The whole set of dog decides to go along with Ōu. Near Ou, they save Rocket and Kyoshiro flow. The two recognize Gennai and they will tell them what has happened Ōu. Kyoshiro speaks ninja dogs weapon and tells Gennai is looking for Akame and Elder Koga. Gennai is reluctant to help, but agrees to Kyoshiro the instigation and command Kazuto, Minoru and Tsuyoshi searches, since then Shion after themselves.
After Ken is saved, Kazuto heads with the others to find Monsoon and begin the attack.
When Monsoon's Kin are dead and with Gin's return he tells them the passing of their friends they all sleep together for the night. When morning comes Kazuto hears Kyoshiro chew Orion out for sending his friends away and then watches the fight by Orion and Kyoshiro even though the kishu lost. He saw Orion crying in tears saying that he stayed behind for the sake of everyone because the Ohu Army needs a true leader.