- ・Trustee, International Association of Development for Early Childhood Education,2014-present
- ・Exiaminer,Awards Committee for the Yomiuri Education Prize,2014-present
- ・Chairman of the Board of Trustees, (NPO) Research Institute of Real Science, 2007-present
- ・Academic Consultant, Kyoto Tonan City High School, 2006-present
- ・Academic Consultant, Kyoto Horikawa City High School 2006-present
- ・Trustee, National Early Childhood Education Research Association, 2006-present
- ・President, The Mathematics Certification Institute of Japan, 2004-2006
- ・Chairman, Awards Committee for the Koshiba Prize on Science Education, 2003-2006
- ・Member, Organizaing Comitittee of UNESCO Project “Experiencing Mathematics”, 2003-2010
- ・Trustee, Heisei Foundation of Basic Science, 2002-2010
- ・Member, National Curriculum Committee of Japan 1997-1998, 2000-2002
- ・Examiner, Awards Committee for the Sankei Automobile Scholarships, 1996-2005
- ・Examiner, Olympus / Mainichi Science Contest, 1992-present
- ・Councilor, National Science and Technology Agency of Japan, 1993-2000
- ・Team Leader, International Mathematical Olympiad, 1990, 1991