By the way, the surname of Saimura comes from Sai-mura Village (才村) (or Sai-mura Village佐江村) where Masahiro was evacuated for a while after his father, Masahide, died.
因みに斎村姓は、父の政秀の死後、一時避難をしていた才村（又は佐江村）に由来する。