Neo-Confucianism then stagnated for years, but in the Edo period, Razan HAYASHI revived it by his 'the theory of fixed division between uppers and lowers' and its theory of ethical duty of the social class as the fundamental principle of the military rule, and Neo-Confucianism was designated as the official scholarship by the Edo bakufu (Japanese feudal government headed by a shogun).
その後は長く停滞したが、江戸時代に入り林羅山によって「上下定分の理」やその名分論が武家政治の基礎理念として再興され、江戸幕府の正学とされた。