The grand father of Ittetsu, Michisada INABA, was from a family of the Kono clan, who was a noble family in Iyo Province, and it is said that the clan became a local clan as the family moved to Mino Province in his time.
一鉄の祖父・稲葉通貞は伊予国の名族・河野氏の一族で、彼の時代に美濃に流れて土豪になったとされている。