Fumihiko GOMI mentioned the names of Yukimasa and Yukimitsu NIKAIDO, Mototsuna GOTO/Morokazu NAKAHARA, Yukikata NIKAIDO/Morotsura NAKAHARA as people who made written records which became a foundation of the work in his essay 'The Structure and Original Historical Materials of Azuma Kagami' in "The Method of Azuma Kagami" before the book was enlarged in 1989.
尚、五味文彦は1989年の増補前の『吾妻鏡の方法』における「吾妻鏡の構成と原史料」において、ベースとなる筆録に二階堂行政・二階堂行光、後藤基綱・中原師員、二階堂行方・中原師連をあげている。