Hosk, produced in Japan from 1953 to 1960, was a motorcycle manufacturer founded by Hideo Hosokawa. The company became known for high-quality four-stroke motorcycles inspired by contemporary British designs, particularly models such as the Hosk 250, 350, and 500 Twin. Renowned for their robust engineering, overhead-valve engines, and excellent build quality, Hosk motorcycles earned a strong reputation in the domestic market and in competition. After financial difficulties, the company was acquired by Showa Corporation in 1960, and its motorcycle designs later contributed to the development of early Honda twin-cylinder models. Characterized by premium construction, British-inspired engineering, and limited production, Hosk remains one of the most respected names of Japan’s early motorcycle industry. Fun fact, HOSK is an acronym based on the first initials of the design team (Hori, Ozeki, Shimizu and Kimura).