Because MIURA considered that the Southern Court of the family line of the Emperor Gomurakami was a false emperor assigned in Yoshino by the Emperor Godaigo for diversionary tactics, he insisted that this line was a Legitimate Succession of the Southern Court.
三浦は後村上天皇系の南朝を後醍醐天皇が陽動作戦のために吉野に設けた擬天皇とするため、この系統が南朝正統と主張している。