"Masu kagami" (The Mirror of Increasing): conveys anecdotes about the aforementioned Yoshitoki and Yasutoki HOJO and about the retired Emperor Gotoba's state and demeanor in exile on Oki island.
『増鏡』：前述の北条義時と泰時の逸話と後鳥羽上皇の隠岐での様子を伝える。