Japanese vintage jumpsuit  with cool japanese font!
It says''SATO BINDER'' which is i think the company name. 
It has 4 pockets and covered buttons on the front.
It has some marks as you can see on the pictures. ( i think that marks adds even better character). 
The waist has adjustable belt on the side. 
It is 50% cotton,50% vinylon
 
-approx measurements-
shoulder to shloulder ...50cm
armpit to armpit ...50cm
waist ...35-45cm
sleeve ...55cm
hips ...47cm
length ...145cm
rise(top to crotch) ...81cm
inseam ...64cm 
 
++taken from seam to seam while the garment is lying flat
++please double the armpit,waist and hips