I believe this to be a form of Japanese rank insignia. Can anyone identify its rank and use? Thanks Bill Bourque

Reverse. Thanks, Bill

Bill,
Its a Sgt. Majors ,type 5 rank insignia used until approx. 1938.
Dean

Hello Dean, thanks for the help. Is this collar or shoulder strap insignia? Best, Bill

Bill, shoulder strap.

Hello Dean and Jareth, thank you for your help. Im a 30 year+ German combat collector and should know more about Japanese gear. If you would like to own this piece please let me know. Best, Bill Bourque