After Yasumori got a position to lead the government administration as the maternal grandfather of Sadatoki, he launched a political reform called 'Koan tokusei' and promulgated a large number of laws and ordinances.
貞時の外祖父として幕政を主導する立場となった泰盛は弘安徳政と呼ばれる幕政改革に着手し、新たな法令を大量に発布した。