hi BG,
we had a japanese member here a while ago, but i think he got scared off the forum for some reason. i even communicated to him in his language via the translator i use. i lived in okinawa when i was 3 years old. however, my neighbor is japanese and if you send an image of the postcard, she can translate it for me. also put your message in french on the french site. i believe there may be a cousin in martinique that may be able to help you. his delcampe pseudo is 'naguito', but his name is andre. he is a postcard collector too. i believe he is of japanese ancestry, but i could be mistaken. but it is worth the effort. good luck.