Lit.: "The Koga Shogun"

The Koga Kubou refers to the head of the Kantou Ashikaga Clan based at Koga in Shimousa Province. The first Koga Kubou was Ashikaga Shigeuji, the fifth Kamakura Kubou, who transferred his stronghold from Kamakura to Koga in 1455 during the Kyoutoku Conflicts. The Koga Kubou is the line of eldest sons from the Kamakura Kubou, and both are called the Kantou Kubou.