Under circumstances where a relation between Emperor Heizei who abdicated from the throne in the previous year, 809, and Emperor Saga was aggravated in 810, Emperor Saga issued the imperial edict to abolish kansatsushi and bringing back sangi in July of the same year.
810年（弘仁1）、前年に譲位した平城上皇と嵯峨天皇の関係が悪化していく中、同年6月、嵯峨天皇は、観察使を廃止して参議を復活する詔を発令した。