He was active at a time when the political system was shifting from a regency government (Sekkan seiji) to government by a retired emperor (In-sei), resulting in huge political, economic and social changes.
その活動時期は摂関政治から院政に移り変わる頃であり、政治経済はもとより社会秩序においても大きな転換の時代にあたる。