Looking for Wife's Mother

My wife birth mother left the USA in the early 80's and moved back to Japan. We looking to travel to Japan and would like to find her and reintroduce my wife to her. The last time they have seen each other was in 1994. The last communication was from this address: Mieko xxxx, xxxx, Urawa City, Saitama Japan.
I know that she was originally from Okinawa

Please do not do double-posting. I deleted your previous thread. Also, I removed her name and address since it's a personal information.
The address was changed, but an apartment still exist there. I PMed you the present address. She might not live there now, but you can try sending a letter to the address.