However in 1960, Tadashi ISHIMODA further analyzed this issue, and pointed out that it was a composition written based on a theory common in the latter half of the Kamakura period, instead of written based on the bakufu's records.
しかし1960年（昭和35年）に石母田正がこの問題を詳細に分析し、これは幕府独自の記録によったものではなく、鎌倉時代の後期の一般的な通説に基づく作文ではないかと指摘する。