吾妻鏡
During the Jōkyū War of 1221, Go-Toba rebelled against the Hōjō. Kamakura was greatly upset by that news, but Masako is said to have calmed it down with her celebrated speech to Kamakura vassals. "Azuma Kagami", the official chronicle of the Kamakura shogunate, tells that Masako summoned the vassals and had these words delivered to them by Adachi Kagemori, the Vice-Governor of Akita Fortress: