Also, unlike today, it was the time when manuscripts that were valuable enough to be used for investigation and study were owned by distinguished families who were descended from daimyo (Japanese feudal lord) or court nobles, and wealthy persons, so he often met with refusals to investigate manuscripts and even if he was allowed to do it, there were various restrictions.
また、現在のように調査・研究の対象となる価値のある写本が公的な施設や大学等の研究機関よりも大名や公家の流れを汲む名家や個人の資産家に多く所蔵されていた時代であり、写本の調査を拒否されたり、許されてもさまざまな制約を付けられる場合も少なくなかった。