"A study of the Pillow Book" written by Kazuhiko HAYASHI mentions his own view and some other past scholars' names such as Keichu, Shinobu ORIKUCHI, and Kikan IKEDA.
林和比古『枕草子の研究』によれば自説と過去の契沖、折口信夫、池田亀鑑などの研究者を挙げている。