Issey Miyake unconstructed blazer from Japan,small

Vintage high end men’s size small unconstructed blazer/ sports coat ...bought in Japan 🇯🇵 . Paid a fortune for it years ago but have taken GREAT care of it!!!! Gorgeous! Pockets are still stitched up (mostly) 4 buttons with 1 xtra button hole at the top of the lapel It appears to be a blend of wool??!! Charcoal color, not gray, not black!!! Very lightweight. Wrinkle resistant! Can be worn all season for sure Dress up or down!!!! Boxy cut. Cute boy blazer for woman too! Fits man up to 5’7”????