Progress in Marine Clay Mineralogy in Japan-past, Present, and Future

The late emeritus professor Toshio Sudo of Tokyo University of Education had frequently mentioned the importance of research in clay mineralogy in ocean and sea. Sudo suggested that the study of glauconite by Takahashi and Yagi initiated marine clay mineralogy in Japan. After the world war second, study on clay mineralogy in marine sediments has been started by the disciples of the Sudo school. Oinuma and Kobayashi have greatly developed the study of clay minerals in marine sediments under the guidance of Sudo. In this review, the author describesa brief history of the progress in marine clay mineralogy in Japan.