I purchased it from a retired Army Sgt. Major who was in the occupation forces in Japan after the end of WWII. He brought back everything but the kitchen sink and sold all of it over the years. He had Japanese medals, rifles, nambu's, baby nambu's, HUNDREDS of saki cups (most of them translated), trays, and bottles. The list went on and on. He also did two tours in Vietnam and even went to the Vietnamese Language School. He brought back bags of patches and badges from there and set up at Military Shows for at least 35 years selling his items. He died this spring from lung cancer so there is a lot of knowledge lost to fellow collectors.
Bob