It is a collection of important documents about the raid compiled by Yasubei, and just before the raid, he asked his dojo mate named Kotaku HOSOI, who was a Confucian scholar and his intimate friend, to compile it, so that it was retained to this day.
安兵衛が討ち入りに関する重要書類をまとめて編集してあったもので、討ち入り直前に堀内道場同門の親友である儒学者細井広沢に編纂をゆだね、今日に伝えている。