According to the inscription of the stone monument "Shinmen Musashi Harunobu Niten Koji-Hi" ("Kokura Hibun") written by Iori in 1654 (nine years after Musashi had died), Musashi's father was a heihoka (tactician), Muni SHINMEN.
武蔵の養子伊織が武蔵の死後9年目の承応3年（1654年）に記した『新免武蔵玄信二天居士碑』（小倉碑文）によると父は兵法家の新免無二である。