The Buddhism during this period in Japan was, under the idea of national protection, governed under the control of the nation and the system of nenbundo-sha (approved people who enter the Buddhist priesthood) was enforced, which admitted a certain number of tokudo (entering the Buddhist priesthood) each year, and in principle, shidoso (priests having entered Buddhist priesthood without permission) was not admitted.
この時代の日本における仏教は中国と同様、鎮護国家の思想の下、国家の管理下で統制されており、年ごとに一定数の得度を許可する年分度者の制度が施行され、原則として私度僧は認められていなかった。