In the article dated December 5, 1232, of "Azuma Kagami", important documents and kikigaki (account of what one hears) from Kyoto in and after the Juei and Genryaku eras, petitions of people, records of suits from samurai families in Rakuchu (inside the capital), Nanto, and Hokurei, shikimoku (law codes in the itemized form, which were used in the medieval Japan) of articles of works of ryoke (virtual proprietors of manor) and the lords of manors in and after the Bunji era, and documents, such as shidai (one of component parts of a Noh play) and orders of deeds of valor of eastern samurai at battles of the Taira clan' in the days of OE no Hiromoto were scattered, and Yasutoki HOJO collected them and transferred them to Astride NAGAI.
『吾妻鏡』1232年（貞永元年）12月5日条に、大江広元の頃の「寿永・元暦以来京都より到来する重書並びに聞書、人々の款状、洛中及び南都・北嶺以下、武家より沙汰し来たる事の記録、文治以後の領家・地頭所務條々の式目、平氏合戦の時東士勲功の次第・注文等の文書」が分散してしまった為、北条泰時がこれを集めさせ、目録とともに長井泰秀に渡したとある。