Masanao's son Kagehide TOYOTA adapted his father's work "Buko-den" for "Niten-ki;" later, in 1909, Miyamoto Musashi Iseki Kenshokai (the association in honor to the accomplishments of Musashi MIYAMOTO) of Kumamoto Prefecture regarded the descriptions in "Niten-ki" as historical facts and based on that to write "Miyamoto Musashi" (called "Kenshokai-bon"); in addition, Eiji YOSHIKAWA wrote a novel "Miyamoto Musashi" (1935-1939) based on the information of "Kenshokai-bon;"therefore, the stories written in "Niten-ki" became famous.
『武公伝』の内容は正脩の子・豊田景英によって『二天記』に再編集され、明治42年（1909年）熊本の宮本武蔵遺蹟顕彰会編纂による『宮本武蔵』通称『顕彰会本』で『二天記』が原資料の一つとなりそのまま史実とされ、さらに吉川英治が小説『宮本武蔵』（1935年-1939年）で『顕彰会本』の内容を用いたことから現代にも広く知られるようになった。