United Nations

• UNCITRAL Japanese government representative (2000-2010)

Science Council of Japan

• 23th and 24th Member (2014-2020)

Japan International Cooperation Agency (JICA)

• Working Group on Cambodian Code of Civil Procedure (Member, 1998-2018)
• Working Group on Chinese Code of Civil Procedure (Member, 2007-2013)
• Working Group on Chinese Law on Liability for Infringement of Rights (Member, 2009-2010)
• Legal Development Domestic Support Committee (Member, 2018-present)

Supreme Court

• Supreme Court Civil Rulemaking Advisory Committee (Secretary and Member, 2003-present)
• Supreme Court Personal Status Litigation Rulemaking Advisory Committee (Secretary and Member, 2003-present)
• Civil mediation commissioner (2006-present)

Ministry of Justice

• Study Group for Revision of Bankruptcy Laws in Contemporary Japanese (Member, 1998-1999)
• Legislative Council Subcommittee regarding Collateral Enforcement Law (Secretary, 2001-2003)
• Legislative Council Subcommittee regarding Code of Civil Procedure and Personal Status Litigation Act (Secretary, 2001-2003)
• Legislative Council Subcommittee regarding Code of Civil Procedure and Civil Execution Act (Secretary, 2003-2004)
• Bar examiner (2004-2007)
• Legislative Council Subcommittee regarding Code of Civil Procedure (Secretary, 2006-2007)
• Certification examiner for certifying dispute resolution business operators under the ADR Act (2007-2019)
• Legislative Council Lawmaking Subcommittee regarding Sovereign Immunity Act (Member, 2008-2009)
• Legislative Council Subcommittee regarding Law of Procedure in Non-contentious Matters and Domestic Affairs Trial Law (Member, 2009-2011)
• Legislative Council Lawmaking Subcommittee regarding Arbitration Law (Member, 2020-2022)

Headquarters for the Promotion of Justice System Reform

• Arbitration Study Group (Deputy Chair, 2002-2004)
• ADR Study Group (Member, 2002-2004)

Cabinet Office

• Study Group regarding Consumer Organizations (Chairman, 2002-2003)
• Quality of Life Council (Temporary Member, 2003-2009)
• Study Committee regarding Consumer Group Lawsuit System (Deputy Chair, 2004-2005)
• Study Committee regarding Way of Being of National Consumer Affairs Center of Japan (Deputy Chair, 2007)
• Study Committee regarding Collective Consumer Damage Recovery System (Chairman, 2008-2009)

Ministry of Education, Culture, Sports, Science and Technology

• Collaborators Meeting for Review and Operations Improvement of the “Guidelines for Responding to Misconduct in Research” (Member, 2013-2015)
• Experts Meeting for Promotion of Fair Research Activities (Member, 2015-present)

Ministry of Internal Affairs and Communications

• Study Group for Development of System Ensuring Proper Information Distribution (Member, 2001)
• Conference related to Privacy Information in the Telecommunications Industry (Member, 2003-2004)

Ministry of Land, Infrastructure, Transport and Tourism

• Central Committee for Adjustment of Construction Work Disputes (Special Member, 2009-present)

Ministry of Agriculture, Forestry and Fisheries

• Experts Meeting for Promotion of Fair Research Activities (Member, 2022-2023)

Ministry of Trade and Industry (now Ministry of Economy, Trade and Industry)

• Bankruptcy Law System Study Group (Member, 1998-1999)
• Corporate Law Study Group regarding Economical Activities and Judicial System (Member, 2000)
• Study Group regarding Way of Being of Bankruptcy Systems in 21^st Century (Member, 2000-2001)

Ministry of Economy, Trade and Industry

• Industrial Structure Council (Temporary Member, 2001-2003)

Fair Trade Commission

• Study Group regarding Trial Proceedings (Member, 1998-1999)
• Study Group regarding Group Lawsuit Systems (Member, 2007)

Japan Patent Office

• Industrial Property Rights Council Subcommittee regarding Intellectual Property Expert Service (Member, 1999-2000)

Consumer Affairs Agency

• Study Group regarding Collective Consumer Damage Relief System (Chairman, 2009-2010

Consumer Commission

• Expert Research Group regarding Collective Consumer Damage Relief System (Deputy Chair, 2010-2011)

National Police Agency

• Experts Meeting for Prevention of Wrongful Acts by Members of Organized Crime Groups (Member, 2011-2012)

Comprehensive Research Organization for Small and Medium Enterprises (now The Small and Medium Enterprise Agency)

• Study Group for Studies related to Small and Medium Enterprise Transaction Issues (Member, 2000)
• DIP Finance Study Group (Member, 2000-2001)
• Study Meeting for Development of Arbitrators List for Small and Medium Enterprise ADR (Member, 2002)

Japan Federation of Bar Associations

• International Arbitration Liaison Council (Member, 2000-2008)