Hideyoshi died when Nagatoshi finished a part of the book: history from 1362 to 1597; in spite of Hideyoshi's death, he expanded the content of the book because of Sukekata OTA's advice; He continued writing about history until the end of the Battle of Sekigahara; Eventually, he finally completed the book.
貞治元年（1362年）から慶長2年（1597年）まで執筆したところで秀吉が没したが、のちに太田資方の勧めで増補し、関ヶ原の戦いの終結までを執筆して完成させた。