 The major work of his retirement years was a three-volume commentary on Fukuzawa Yukichi's principal work "Bunmeiron no Gairyaku", based on a lengthy seminar he conducted with a small working group.This was published in 1986, as "Reading 'An Outline of a Theory of Civilisation',"(「文明論之概略」を読む) by Iwanami Shoten.Besides, he contributed several more noteworthy as well as controversial works on Japanese culture or the process of translation in modern Japan.