Shoji Hara Shoten / Hara Kogyo, (Nagoya), 1950 ?
原正二商店/原工業
Shoji Hara Shoten was either sold to, or renamed as Hara Kogyo, and is listed in several places, including the Japanese language wikipedia site. Supposedly they made a machine called the Lipton (リプトン号) however I have not found any other information as to whether it was a clip on, a scooter or an actual motorcycle.