These words imply that what Dosan did was an equal match to the way Tadamune OSADA of Owari Province murdered his former master, MINAMOTO no Yoshitomo, during the battle between MINAMOTO and TAIRA families.
これは源平合戦の頃、尾張の長田忠致が旧主の源義朝を謀殺したことと、道三の行状が匹敵するということを謡っている。