Just fooling around with the net and spotted your note.
My mother was Shigeko Izumi.She has a sister who is married to a Yoshie and I was born as Shigemi. My mothers people are from Matsuyama. I was born in Kure,Shikoku.She was from a family of 9. I think 2 brother and five girls..Goodluck....I believe that Izumi is quite a common name. I believe my grandparents were in their 90's when they passed away.