- 2024 - 2025 14th International Conference on Software and Computer Applications (ICSCA2025) Program Co-Chair
- 2023 - 2024 28th International Conference on Engineering of Complex Computer Systems (ICECCS2024) プログラム委員会 委員
- 2023 - 2024 インタラクション2024シンポジウム プログラム委員会 委員
- 2023 - 2024 第26回プログラミングおよびプログラミング言語ワークショップ(PPL2024) プログラム委員会 委員
- 2023 - 2024 13th International Conference on Software and Computer Applications (ICSCA2024) 広報共同委員長
- 2023 - 2023 4th European Symposium on Software Engineering (ESSE2023) Publication Chair
- 2023 - 2023 FedCSIS2023併設 16th International Workshop on Computational Optimization (WCO2023) プログラム委員会 委員
- 2022 - 2023 27th International Conference on Engineering of Complex Computer Systems (ICECCS2023) プログラム委員会 委員
- 2022 - 2023 インタラクション2023シンポジウム プログラム委員会 委員
- 2022 - 2023 12th International Conference on Software and Computer Applications (ICSCA2023) 広報共同委員長
- 2022 - 2022 JURIX2022併設 International Workshop on AI Compliance Mechanism (WAICOM2022) プログラム委員会 委員
- 2022 - 2022 30th International Symposium on Graph Drawing and Network Visualization (GD2022) プログラム委員会 委員
- 2022 - 2022 FedCSIS2022併設 15th International Workshop on Computational Optimization (WCO2022) プログラム委員会 委員
- 2022 - 2022 3rd European Symposium on Software Engineering (ESSE2022) Publication Chair
- 2022 - 2022 11th International Conference on Software and Computer Applications (ICSCA2022) Member, Technical Committee
- 2021 - 2022 26th International Conference on Engineering of Complex Computer Systems (ICECCS2022) Member, Program Committee
- 2021 - 2022 Interaction 2022 Symposium Member, Program Committee
- 2021 - 2021 29th Workshop on Interactive Systems and Software (WISS2021) Treasurer, Organizing Committee / Member, Program Committee
- 2021 - 2021 2nd European Symposium on Software Engineering (ESSE2021) Member, Technical Committee
- 2021 - 2021 14th International Workshop on Computational Optimization (WCO2021) at FedCSIS2021 Member, Program Committee
- 2021 - 2021 10th International Conference on Software and Computer Applications (ICSCA2021) Member, Technical Committee
- 2020 - 2021 10th Science Intercollegiate Member, Screening Committee
- 2020 - 2021 Interaction 2021 Symposium Member, Program Committee
- 2020 - 2020 12th International Conference on Computer and Automation Engineering (ICCAE2020) Member, Technical Committee
- 2020 - 2020 28th Workshop on Interactive Systems and Software (WISS2020) Treasurer, Organizing Committee / Member, Program Committee
- 2020 - 2020 2020 European Symposium on Software Engineering (ESSE2020) Member, Technical Committee
- 2020 - 2020 13th International Workshop on Computational Optimization (WCO2020) at FedCSIS2020 Member, Program Committee
- 2019 - 2020 Interaction 2020 Symposium Member, Program Committee
- 2019 - 2020 9th Science Intercollegiate Member, Screening Committee
- 2017/07 - 2019/06 Japan Society for the Promotion of Science (JSPS) Referee, Screening Committee on Research Fellowships for Young Scientists
- 2019 - 2019 27th Workshop on Interactive Systems and Software (WISS2019) Treasurer, Organizing Committee / Member, Program Committee
- 2019 - 2019 31st International Conference on Tools with Artificial Intelligence (ICTAI2019) Member, Program Committee
- 2019 - 2019 12th International Workshop on Computational Optimization (WCO2019) at FedCSIS2019 Member, Program Committee
- 2019 - 2019 25th International Conference on Principles and Practice of Constraint Programming (CP2019) Member, Program Committee
- 2018 - 2019 Interaction 2019 Symposium Member, Program Committee
- 2006/04 - 2018/03 Japan Society for Software Science and Technology (JSSST) Member, Editorial Committee
- 2018 - 2018 11th International Workshop on Computational Optimization (WCO2018) at FedCSIS2018 Member, Program Committee
- 2018 - 2018 24th International Conference on Principles and Practice of Constraint Programming (CP2018) Member, Program Committee
- 2018 - 2018 26th Workshop on Interactive Systems and Software (WISS2018) Treasurer, Organizing Committee / Member, Program Committee
- 2017 - 2018 Interaction 2018 Symposium Member, Program Committee
- 2017 - 2017 10th International Workshop on Computational Optimization (WCO2017) at FedCSIS2017 Member, Program Committee
- 2017 - 2017 25th Workshop on Interactive Systems and Software (WISS2017) Treasurer, Organizing Committee / Member, Program Committee
- 2017 - 2017 26th International Joint Conference on Artificial Intelligence (IJCAI2017) Member, Senior Program Committee
- 2016 - 2017 IEICE Transactions on Information and Systems Editor, Special Section on Formal Approaches (Vol. E100-D, No. 6), Editorial Committee
- 2016 - 2017 Interaction 2017 Symposium Member, Program Committee
- 2012/06 - 2016/05 Japan Society for Software Science and Technology (JSSST) Trustee for Editorial Affairs
- 2012/06 - 2016/05 Japan Society for Software Science and Technology (JSSST) Representative Member
- 2016 - 2016 22nd International Conference on Principles and Practice of Constraint Programming (CP2016) Member, Program Committee
- 2016 - 2016 9th International Workshop on Computational Optimization (WCO2016) at FedCSIS2016 Member, Program Committee
- 2015 - 2016 Japan Society for Software Science and Technology (JSSST) Editor, Special Issue on Software Papers (Vol. 33, No. 4), Editorial Committee
- 2015 - 2016 Journal of the Information Processing Society of Japan (IPSJ) Editor, Special Issue on Understanding, Foundation, and Applications of Interaction (Vol. 57, No. 4), Editorial Committee
- 2015 - 2016 IEICE Transactions on Information and Systems Editor, Special Section on Formal Approaches (Vol. E99-D, No. 6), Editorial Committee
- 2015 - 2016 Interaction 2016 Symposium Member, Program Committee
- 2015 - 2015 8th International Symposium on Visual Information Communication and Interaction (VINCI2015) Member, Program Committee
- 2015 - 2015 13th International Symposium on Smart Graphics (SG2015) Member, Program Committee
- 2015 - 2015 8th Workshop on Computational Optimization (WCO2015) at FedCSIS2015 Member, Program Committee
- 2014 - 2015 Japan Society for Software Science and Technology (JSSST) Editor, Special Issue on Software Papers (Vol. 32, No. 4), Editorial Committee
- 2014 - 2015 Interaction 2015 Symposium Member, Program Committee
- 2014 - 2015 Journal of the Information Processing Society of Japan (IPSJ) Editor, Special Issue on Understanding, Foundation, and Applications of Interaction (Vol. 56, No. 4), Editorial Committee
- 2014 - 2015 IEICE Transactions on Information and Systems Editor, Special Section on Formal Approaches (Vol. E98-D, No. 6), Editorial Committee
- 2012/12 - 2014/11 Japan Society for the Promotion of Science (JSPS) First-Stage Referee, Committee on Grants-in-Aid for Scientific Research (KAKENHI)
- 2014 - 2014 21st European Conference on Artificial Intelligence (ECAI2014) Member, Program Committee
- 2014 - 2014 12th International Symposium on Smart Graphics (SG2014) Member, Program Committee
- 2014 - 2014 7th Workshop on Computational Optimization (WCO2014) at FedCSIS2014 Member, Program Committee
- 2014 - 2014 7th IEEE Pacific Visualization Symposium (PacificVis2014) Member, Program Committee
- 2013 - 2014 Japan Society for Software Science and Technology (JSSST) Editor, Special Issue on the 30th Anniversary, Editorial Committee
- 2013 - 2014 Japan Society for Software Science and Technology (JSSST) Editor, Special Issue on Software Papers (Vol. 31, No. 4), Editorial Committee
- 2013 - 2014 Interaction 2014 Symposium Member, Program Committee
- 2013 - 2014 Journal of the Information Processing Society of Japan (IPSJ) Editor, Special Issue on Understanding, Foundation, and Applications of Interaction (Vol. 55, No. 4), Editorial Committee
- 2013 - 2014 IEICE Transactions on Information and Systems Editor, Special Section on Cyberworlds (Vol. E97-D, No. 8), Editorial Committee
- 2013 - 2013 Japan Society for Software Science and Technology (JSSST) Editor, WISS Recommended Papers (Vol. 30, No. 4), Editorial Committee
- 2013 - 2013 6th Workshop on Computational Optimization (WCO2013) at FedCSIS2013 Member, Program Committee
- 2012 - 2013 Japan Society for Software Science and Technology (JSSST) Editor, Special Issue on Software Papers (Vol. 30, No. 4), Editorial Committee
- 2012 - 2013 Interaction 2013 Symposium Member, Program Committee
- 2012 - 2013 Journal of the Information Processing Society of Japan (IPSJ) Editor, Special Issue on Understanding, Foundation, and Applications of Interaction (Vol. 54, No. 4), Editorial Committee
- 2012 - 2012 Japan Society for Software Science and Technology (JSSST) Editor, WISS Recommended Papers (Vol. 29, No. 4), Editorial Committee
- 2012 - 2012 NII Shonan Meeting on Parallel Methods for Constraint Solving and Combinatorial Optimization Organizer
- 2012 - 2012 Workshop on Computational Optimization (WCO2012) at FedCSIS2012 Member, Program Committee
- 2011 - 2012 Japan Society for Software Science and Technology (JSSST) Editor, Special Issue on Software Papers (Vol. 29, No. 4), Editorial Committee
- 2011 - 2012 Journal of the Information Processing Society of Japan (IPSJ) Editor, Special Issue on Understanding, Foundation, and Applications of Interaction (Vol. 53, No. 4), Editorial Committee
- 2011 - 2012 Interaction 2012 Symposium Member, Program Committee
- 2011 - 2011 Workshop on Computational Optimization (WCO2011) at FedCSIS2011 Member, Program Committee
- 2011 - 2011 28th Conference of the Japan Society for Software Science and Technology (JSSST) Member, Program Committee
- 2011 - 2011 10th International Symposium on Smart Graphics (SG2011) Member, Program Committee
- 2010 - 2011 Japan Society for Software Science and Technology (JSSST) Editor, Special Issue on Software Papers (Vol. 28, No. 4), Editorial Committee
- 2010 - 2011 Interaction 2011 Symposium Member, Program Committee
- 2010 - 2011 Japan Society for Software Science and Technology (JSSST) Editor, Special Issue on Interactive Systems and Software (Vol. 28, No. 2), Editorial Committee
- 2010 - 2011 Journal of the Information Processing Society of Japan (IPSJ) Editor, Special Issue on Foundations, Designs and Applications of Interaction (Vol. 52, No. 2 / No. 4), Editorial Committee
- 2010 - 2010 10th International Symposium on Smart Graphics (SG2010) Member, Program Committee
- 2010 - 2010 Workshop on Computational Optimization (WCO'10) at IMCSIT2010 Member, Program Committee
- 2010 - 2010 27th Conference of the Japan Society for Software Science and Technology (JSSST2010) Program Chair
- 2009 - 2010 Interaction 2010 Symposium Member, Program Committee
- 2003/04 - 2009/03 Japan Society for Software Science and Technology (JSSST) Member, Planning Committee
- 2009 - 2009 9th International Symposium on Smart Graphics (SG2009) Member, Program Committee
- 2008 - 2009 Interaction 2009 Symposium Member, Program Committee
- 2008 - 2009 Japan Society for Software Science and Technology (JSSST) Editor, Special Issue on Interactive Systems and Software (Vol. 27, No. 1), Editorial Committee
- 2008 - 2009 Journal of the Information Processing Society of Japan (IPSJ) Editor, Special Issue on Foundations, Designs and Applications of Interaction (Vol. 51, No. 2), Editorial Committee
- 2006/04 - 2008/03 Information Processing Society of Japan (IPSJ) Representative Member
- 2008 - 2008 8th International Symposium on Smart Graphics (SG2008) Member, Program Committee
- 2008 - 2008 Japan Society for Software Science and Technology (JSSST) Editor, Special Issue on Progress in Logic and Reasoning Technology, Editorial Committee
- 2008 - 2008 25th Conference of the Japan Society for Software Science and Technology (JSSST) Member, Program Committee
- 2008 - 2008 16th Workshop on Interactive Systems and Software (WISS2008) Member, Program Committee
- 2008 - 2008 14th International Conference on Principles and Practice of Constraint Programming (CP2008) Member, Program Committee
- 2007 - 2008 Journal of the Information Processing Society of Japan (IPSJ) Editor, Special Issue on Industry-University Cooperative Research, Editorial Committee
- 2007 - 2008 2008 IEEE Pacific Visualization Symposium (PacificVis2008) Finance Chair
- 2007 - 2008 Interaction 2008 Symposium Member, Program Committee
- 2007 - 2008 Journal of the Information Processing Society of Japan (IPSJ) Editor, Special Issue on Progress in Media and Interaction Research, Editorial Committee
- 2007 - 2008 Japan Society for Software Science and Technology (JSSST) Editor, Special Issue on Interactive Systems and Software (Vol. 26, No. 1), Editorial Committee
- 2006/06 - 2007/05 Journal of the Information Processing Society of Japan (IPSJ) Editor-in-Chief, Information Systems Group, Editorial Committee
- 2007 - 2007 7th International Symposium on Smart Graphics (SG2007) Member, Program Committee
- 2007 - 2007 15th Workshop on Interactive Systems and Software (WISS2007) Member, Program Committee
- 2007 - 2007 Workshop on Constraint-Based Layout of Diagrams and Documents (CBLDD) at GD2007 Member, Organizing Committee
- 2006 - 2007 Interaction 2007 Symposium Member, Program Committee
- 2006 - 2007 Journal of the Information Processing Society of Japan (IPSJ) Editor, Special Issue on Understanding and Design of Interaction, Editorial Committee
- 2005/06 - 2006/05 Journal of the Information Processing Society of Japan (IPSJ) Associate Editor-in-Chief, Basic Technology Group, Editorial Committee
- 2006 - 2006 21st IEEE/ACM International Conference on Automated Software Engineering (ASE2006) Exhibits Chair
- 2006 - 2006 23rd Conference of the Japan Society for Software Science and Technology (JSSST) Member, Program Committee
- 2006 - 2006 14th Workshop on Interactive Systems and Software (WISS2006) Member, Program Committee
- 2006 - 2006 Journal of the Information Processing Society of Japan (IPSJ) Senior Editor, Special Issue on Principles and Practice of Interaction Technology, Editorial Committee
- 2006 - 2006 1st International Workshop on Constraint Programming for Graphical Applications at CP2006 Member, Organizing Committee / Program Committee
- 2006 - 2006 11th Annual Asian Computing Science Conference (ASIAN2006) Member, Local Organization Committee
- 2005 - 2006 Journal of the Information Processing Society of Japan (IPSJ) Editor, Special Issue on Industry-University Cooperative Research, Editorial Committee
- 2005 - 2006 Asia Pacific Symposium on Information Visualisation 2006 (APVIS2006) Member, Organizing Committee / Program Committee
- 2003/06 - 2005/05 Journal of the Information Processing Society of Japan (IPSJ) Editor, Basic Technology Group, Editorial Committee
- 2005 - 2005 1st International Workshop on Distributed and Speculative Constraint Processing (DSCP2005) at CP2005 Member, Organizing Committee
- 2005 - 2005 2nd Franco-Japanese Workshop on Constraint Programming (FJCP2005) Member, Organizing Committee
- 2005 - 2005 13th Workshop on Interactive Systems and Software (WISS2005) Member, Program Committee
- 2004 - 2005 Interaction 2005 Symposium Local Arrangements Chair
- 2004 - 2004 12th Workshop on Interactive Systems and Software (WISS2004) Member, Program Committee
- 2004 - 2004 1st Franco-Japanese Workshop on Constraint Programming (FJCP2004) Member, Organizing Committee
- 2003 - 2004 Interaction 2004 Symposium Member, Executive Committee