Masanao TOYOTA, another instructor of Niten Ichi-ryu and a vassal of the Matsui clan who had served the Hosokawa family as Hitto karo (the head of chief retainers), wrote the Musashi biography "Buko-den" in 1755, and recorded tales by Musashi's direct disciples, which Masatake TOYOTA (Masanao's father) had gathered before.
細川家筆頭家老松井氏の家臣で二天一流師範、豊田正脩が宝暦5年（1755年）に完成させた『武公伝』には、正脩の父・豊田正剛が集めた武蔵の弟子達が語った生前の武蔵に関する伝聞が記載されている。