Hokkaido Air System (HAC) is a Japanese regional airline that operates scheduled services in Hokkaidō and Aomori Prefecture, Japan from a main base of operations at Okadama Airport in Higashi-ku, Sapporo. As of June 30, 2023, the airline is owned by Japan Airlines (57.3%), Hokkaido Prefecture (19.5%), Sapporo City (13.5%) and 16 other shareholders (9.7%).