There he met Dr. Hisao Sugino, a professor of biology of the Osaka Normal College, whose main theme of academic studies was the analysis of planarian regeneration.
In the spring of 1951, Kawakatsu became a private helper of Prof. Okugawa in his research on the sexual induction in asexual forms of Japanese freshwater planarians.
[citation needed] In the beginning of April, 1961, Kawakatsu moved to the Fuji Women's College in Sapporo to work as an associate professor of biology, remaining until 1966.
[citation needed] Although attaining nearly 12 classes per week, Kawakatsu used his spare time to study the taxonomy of freshwater planarians from Japan and neighboring countries.
[1] After attending at the Libbie Henrietta Hyman Memorial Symposium in December, 1970, Chicago, Kawakatsu started a series of cooperative studies with other researchers.