It is said that he ordered his vassals to compile a book in 10 months to cover the family lineage and the brief biography of all the territorial lords existed in the 80 years from 1600 through 1680, and he always kept the book, titled "Hankanpu," on hand.
また慶長5年（1600年）から延宝8年（1680年）に至る80年間の諸大名家の家系図と略伝を10ヶ月でまとめさせ、『藩翰譜』と題して常に手元に置いたという。