Since his older brother Yasuyuki (also known as Motohide IZUMI) succeeded to the head family of the Izumi-ryu school, he was adopted by the Yamawaki family and since then he has maintained the family line of his father Tokuro MIYAKE, the ninth family.
兄、保之（和泉元秀）が和泉流宗家を継ぐ為、山脇家の養子になったあと、父・九世三宅藤九郎家の家系を守っている。