Shouei System

Shouei System Co., Ltd. 1981-1982, was a Japanese company that began developing and distributing videogames in 1985. They were known for their work on the Fist of the North Star games, published by Toei Animation, and the Heiwa Pachinko World games that they published. They appear to have hired or worked with staff from the company Bears Co., Ltd. for their game development work until 1990 when they began contracting with other companies, mainly Copya System Ltd. and Office Koukan Co., Ltd.

Source : IGDB