In his survey, he reportedly discovered inadequacies in the existing books of Buddhist history and noticed that attention was not being paid on the traditions of the various religious sects, the protection of temples by successive prime ministers or government officials, and the preservation of the teachings of Zen sect.
その結果、従来の仏教史書に不十分な点が見られ、諸宗派の伝承、歴代の宰相や顕官による外護のあり様や、禅宗の伝灯に注意が払われていない点などに気づいた、という。