In his late years, Musashi often told about the fights with the Yoshioka, however, as for the duel with Ganryu, there remain very few reliable tales and Musashi himself didn't mention anything about it in "Gorin no sho," therefore, presumably, he scarcely told about the duel with Ganryu in Funa-shima.
これは、晩年の武蔵が度々吉岡との勝負を語っていたという逸話と対照的であり、『五輪書』に岩流との勝負についての記述が全くない事実を考えると晩年の武蔵は舟島での岩流との勝負について自ら語ることが殆どなかったと推測することができる。