Iwase Province (石背国, Iwase no Kuni) is an old province in the area of western Fukushima Prefecture on the island of Honshū.[1] The history of the province started in 718 and ended in 722 or 724.
↑Kodama. (1958). 図日本文化史大系, p. 30; excerpt, 石背国 718-724?