出羽國
In 878, Yasunori was appointed Kokushi of Dewa Province. At the time, Emishi started a rebellion in Dewa Province, and completely defeated the government army. Yasunori was appointed a provincial governor, because he was respected for his governance. After arriving at his new post in Dewa, Yasunori deployed soldiers and supplied the government's reserve supply of rice to the people. When he heard about Yasunori's good government, Emishi gave in without further resistance. The Japanese court ordered Yasunori to suppress the rebellion completely, but he advised the Court that a generous policy was good for Dewa Province. This rebellion, known as "Gangyō-Rebellion", ended without the use of force.