In 1409, he took over as the family head due to his father Yasunori's death (there are various theories regarding the year of Yasunori's death and it is also said that he might have taken over earlier than 1409).
1409年、父・泰範の死により家督を相続する（泰範には没年に異説が多く、それ以前に家督を継いだとも考えられている）。