Historically: In the Sengoku era, he served three generations of the Nagao Clan: Nagao Tamekage, Nagao Harukage, and Uesugi Kenshin and was master of Hirabayashi Castle. He was one of Kenshin's most respected generals and Kenshin's military chief of staff. He was killed at the siege of the rebellious Honjou Shigenaga's castle.
In Mirage of Blaze: One of the Yasha-shuu under Uesugi Kagetora's command. He is the only one out of the five Yasha-shuu who survives the battle with Oda Nobunaga thirty years before the start of Volume 1, and carries on the mission alone while the others are reborn. He is a baby when Naoe finds Kagetora again thirty years later, having only performed kanshou two years previously.