This is an old indigo dyed shirushi-hanten jacket.
 
"Shirushi hanten" is a type of hanten jacket that features distinctive patterns or symbols called "shirushi" on its front and back. These shirushi can vary in design and often carry symbolic meanings or represent specific affiliations. 
 
Shirushi hanten are often worn as a form of identification or as a way to show allegiance to a particular group, such as a company or a neighbor groups.
 
Dimensions :
color to bottom edge: 84cm (33in),
Sleeve Edge to Edge Across Shoulders: 130cm (51in)
Armpit to armpit: 61cm (24in)