As the first son of MINAMOTO no Yoshitomo, he protected Kamakura, and killed his uncle MINAMOTO no Yoshikata; this proved him as a brave busho and gave rise to his nickname Akugenta.
源義朝の長男で鎌倉を守り、叔父の源義賢を討って悪源太と呼ばれた剛の武者。