Showa Manufacturing Co., Ltd, Numazu, 1953
日本軽自動車商工協同組合
I suspect this was a very short lived company, and all I've found is a photo of the engine on the Yaplog site. It was called the Showa Blue Bird (昌和ブルーバード号). It used a 65cc two stroke engine - possibly a copy of an earlier Italian design.
