Hokushin Heavy Industries (HHI) Co., Ltd. is a Japanese heavy industry company with the military division and the civilian division, and is a member of Hokushin Group (Its holding company is Hokushin Holdings Co., Ltd.). The military division has produced the famous 5th-generation fighter jet, the Jupiter series, and its successor, the 6th-generation fighter jet Regulus series.

The civilian division has recently begun to develop passenger aircraft, Hokushin Jet series, such as a private jet, a mid-size airliner, and a supersonic airliner.