These movements implies the arrival of shoen koryo sei (the system of public lands and private estates), which was the social structure throughout the medieval age, and based on this fact together with the advent of cloister government, we can consider that the medieval age already arrived in late 11th century.
これらの動きは、中世を通じて社会体制であり続けた荘園公領制の出現を意味するものであり、これと相前後して開始した院政と併せて、11世紀後期には既に中世に入っていたと見ることもできる。