The Gaien province (Mi1) was a Dragon province of the Mirumoto family. It was bordered in the North by the Sabishii province (Ta1), in the East by the Yakeishi province (Mi2), in the South by the Shinpi province, and the Unicorn territory laid in the West, separated by the Great Climb. Foothills Keep and a small Temple to Benten were located within the province.