Hizen Province (肥前国, Hizen no kuni) was an old province of Japan in the area of the Saga and Nagasaki prefectures. It was sometimes called Hishū (肥州), with Higo Province. Hizen bordered on the provinces of Chikuzen and Chikugo. The province was included in Saikaidō. It did not include the regions of Tsushima and Iki that are now part of modern Nagasaki Prefecture.