Well I'm stumped. Bought this badge on a whim at a gun show earlier in the year, and I have yet to find anything like it. I thought it was some variant of a proficiency badge. When I consulted Mr. Catalano on his site, he said it could possibly be some sort of cap device. Now I'm wondering if it is even Japanese. Due to the flower in the back, could it possibly be Nationalist China, Korean? Any insight would be appreciated.