With his retirement from Hokudai in 1994 he took several positions in other universities: 1994–1995 Okayama University of Science and 1995–2002 Kurashiki University of Science and the Arts.
Co seu retiro da Universidade de Hokkaido en 1994 asumiu diversos cargos noutras universidades: de 1994 a 1995 na Universidade de Ciencias de Okayama e de 1995 a 2002 na Universidade de Ciencias e Artes de Kurashiki.