As to the reign of Shogun Yoritomo since then, Yukimasa NIKAIDO's written records are considered to be the most likely source material for the foundation of "Azuma Kagami" at this time, although FUJIWARA no Toshikane also appears a lot as a senior officer of writing in the book.
それ以降の将軍頼朝の時代については、藤原俊兼も頼朝の右筆として沢山出てくるが、この時期の『吾妻鏡』のベースとしては、二階堂行政の筆録が有力とされる。