According to "Kantobisho," a book written by FUJIWARA no Toshinari, To no chujo was engaged in 'all matters at the Imperial palace' and To no ben was engaged in 'nationally important matters.'
藤原俊憲の『貫頭秘抄』には、頭中将は「禁中万事」を申し行い、頭弁は「天下巨細」を執奏するとされている。