Academic Societies
May 1975- April 1979
Editorial Board, Information Processing Society of Japan
November 1979- March 1984
Editorial Board, Japan Society for Software Science and Technology
November 1989- March 1995
Directors Board, Japan Society for Software Science and Technology
April 1992- March 1996
Chairman of Editorial Board, Japan Society for Software Science and Technology
September 1992- August 1996
Committee Member of Research, Information Processing Society of Japan
April 1996- March 1998
Editorial Board, Japan Society for Software Science and Technology
April 1996- March 1997
Councilor, Japan Society for Software Science and Technology
April 1997- March 1999
Directors Board, Japan Society for Software Science and Technology
April 1999- March 2002
Director, Japan Society for Software Science and Technology
Program Chair, First Fuji International  Workshop on Functional and Logic Programming, July 17-19, 1995
General Chair, Second Fuji International Workshop on Functional and Logic Programming, November 1-4, 1996
(Academic Society in Japanese)