- 2024 - 現在 FoSSaCS: Steering Committee Member
- 2021 - 現在 LICS: Steering Committee Member
- 2021 - 現在 TheoretiCS: Editorial Board Member
- 2017 - 現在 LMCS (Logical Methods for Computer Science) Editor
- 2024/07 - 2025/06 日本ソフトウェア科学会 副理事長
- 2024/01 - 2025/04 FoSSaCS 2025: PC member
- 2024/04 - 2025/01 POPL 2025: PC member
- 2021 - 2024/06 FSCD: Steering Committee Member
- 2023/04 - 2024/04 FoSSaCS 2024 プログラム委員会共同委員長
- 2022/10 - 2023/07 LICS 2023: PC member
- 2019 - 2021/07 FSCD 2021 PC Chair
- 2020 - 2021 POPL 2021 PC member
- 2018 - 2020/08 LICS 2020 PC Chair
- 2020 - 2020 MFCS 2020 PC member
- 2016 - 2019 FSCD Steering Committee member
- 2005 - 2019 FoSSaCS 2005,2009,2013,2019 PC member
- 2009 - 2018 ESOP 2010,2018 PC member
- 2002 - 2017 CONCUR 2003,2016,2017 PC member
- 2015 - 2016 FSCD 2016 PC member
- 2014 - 2016 Fundamenta Informaticae編集委員
- 2014 - 2015 CPP 2015 PC member
- 2014 - 2015 ICALP 2015 TrackB PC Chair
- 2004 - 2015 POPL 2005,2011,2015 PC member
- 2013 - 2014 CSL-LICS 2014 PC member
- 2004 - 2011 APLAS 2005,2006 (Chair),2008,2011 PC member
- 2009 - 2010 FLOPS 2010 General Chair
- 2009 - 2010 LICS 2008,2010,2012 PC member