If Kanpachiro's tale were true and Masanao wrote the tale exactly the way it had been record by his grandfather, a question arises; it is very strange that Masanao relied on the mysterious man's tale taken from another domain, because it means that the both of the Hosokawa family and the Matsui family, which Masanao and Masatake had served, hadn't reserved any document which mentioned the remarkable incident such as the duel permitted by the lords.
仮に、この勝負の内容が、事実であれば、細川家でこれだけの事件が起こったにもかかわらず、それについての記述が『武公伝』の編集当時に、細川家中や正剛・正脩の仕える松井家中になく、藩外の怪しげな人物からの伝聞しかなかったことになる。