He argued the history and insistently advocated the Theories of Legitimacy of the Northern Court, saying, 'Now that the present Imperial Court is from the Northern Court lineage, you are a retainer of the Northern Court, aren't you?' and these words provoked Sanyo's anger.
歴史を論じて北朝正統論を強く主張し、｢今の朝廷は北朝(日本)の系統であるから、君は北朝の臣ではないか｣といって山陽の怒りを買った。