It was often seen in and after the period of the Northern and Southern Courts when the formation of the Shugo-ryogoku system (the system that a Shugo dominates a manor) and the goson-sei (system of coalitions of villages) advanced.
特に守護領国制や郷村制の形成が進んだ南北朝時代_(日本)以後によく見られるようになった。