Yamazaki Internal Combustion Engine Laboratory, Kochi City, 1953-55
山崎内燃機関研究所
Yamazaki made the Blue Bird moped (ブリューバード号). See also another Blue Bird made by Showa Manufacturing <a href="page217" target=_blank">at this link.
Mike sent me a scan from the 1955 Auto-By Magazine showing a 125cc version, which I suspect that would have been terrifying to use as a moped !