Looking for Sachie Kawamitsu

I am attempting to reconnect with a very dear friend Sachie Kawamitsu. We were together in Okinawa from 1973-74. Sachie lived in Kin-Kinson, Okinawa but moved to Osaka, Japan after I left. We stayed in touch with each other for a couple of years after, but I stopped writing to her and regrettably lost contact.

She had a friend Yoko who married a marine captain.
She also had an aunt in Osaka that owned a beauty shop.
When Sachie was in Osaka she worked in a branch office of a Tokyo based chemical company.

Last known addresses
Sachie Kawamitsu
4144-18 Kin – Kinson
Okinawa, Japan 904-12

Sachie Kawamitsu
c/o Sawada
Shato Matsubra / f106
5 go.3. Shimizu, 4-chome
Asahi-Ku, Osaka-shi, Japan

Sachie Kawamitsu
Mizukado so No. 2
22-12 shimizu 3-chome
Asahi-Ku, Osaka-shi
Osaka, Japan #535

Her Kanji name may be:

ﾂ静ｬ窶毒ｾ Kawamitsu

ﾂ債ｹ窶冦ﾅ?G Sachie
ﾂ幸ﾅ鍛 Sachie (more likely)

Any help would be greatly appreciated.
Thank you
Sincerely, Nelson (Rocky) Strauch