2009-2011: Member of the Stakeholders Platform, WIPO
2003-2005: WSIS Civil Society Bureau Disability Focal Point
2003-2009: Manager, DAISY for All Project
2003-2006: Member of the United Nations Working Group, World Blind Union
2002-: Member of JICA Advisory Committee for Persons with Disabilities
1999-: Steering Council, W3C Web Accessibility Initiative
1998-2003, 2011-: Chairman, Copyright Committee, Disability Concerned National Forum on Broadcasting
1996-: Board Member, the DAISY Consortium (President: 2008-2011)
1984-2003, 2007- : Standing Committee, SLB(LPD)/IFLA (Chair: 1990-1995)
1978-: Member, Committee on Library Services for Persons with Disabilities/JLA