By contrast, Yoshitomo, who was the eldest son of Tameyoshi and was based in the Kanto region, joined the army of the Emperor Goshirakawa, along with most of the samurai of the eastern regions.
一方、関東地方を地盤としていた為義の嫡男の義朝は多くの東国武士とともに天皇方へ参じている。