- 2015/04 - 現在 GÉANT, Global eduroam Governance Committee 委員
- 2008/04 - 現在 National Institute of Informatics Visiting Associate Professor
- 2008/04 - 現在 国立情報学研究所・客員准教授 客員准教授
- 2005/04 - 現在 全国共同利用センター情報基盤センター長会議 認証研究会 委員
- 2005/04 - 現在 全国共同利用センター情報基盤センター長会議 認証研究会 委員
- 2000/02 - 現在 The Institute of Electronics, Information and Communication Engineers Regular Reviewer
- 2000/02 - 現在 電子情報通信学会 査読委員
- 2021/11 - 2022/07 The 5th IEEE International Workshop on Secure Digital Identity Management (SDIM 2022) Program Committee Chair
- 2020/11 - 2021/07 The 4th IEEE International Workshop on Secure Digital Identity Management (SDIM 2021) Program Committee Chair
- 2019/11 - 2020/07 The 3rd IEEE International Workshop on Secure Digital Identity Management (SDIM 2020) Program Committee Chair
- 2018/11 - 2019/07 The 2nd IEEE International Workshop on Secure Digital Identity Management (SDIM 2019), in conjunction with COMPSAC2019 Program Committee Chair
- 2017/11 - 2018/07 The 1st IEEE International Workshop on Secure Digital Identity Management (SDIM 2018), in conjunction with COMPSAC2018 Program Committee Chair
- 2016/11 - 2017/07 The 3rd IEEE International COMPSAC Workshop on Secure Identity Management in the Cloud Environment (SIMICE 2017), in conjunction with COMPSAC2017 Program Committee Chair
- 2015/11 - 2016/07 The 2nd IEEE International Workshop on Middleware for Cyber Security, Cloud Computing and Internetworking (MidCCI 2016), in conjunction with COMPSAC2016 Program Committee Chair
- 2015/11 - 2016/07 The 2nd IEEE International Workshop on Middleware for Cyber Security, Cloud Computing and Internetworking (MidCCI 2016), in conjunction with COMPSAC2016 Program Committee Chair
- 2014/11 - 2015/07 The 1st IEEE International Workshop on Middleware for Cyber Security, Cloud Computing and Internetworking (MidCCI 2015), in conjunction with COMPSAC2015 Program Committee Chair
- 2014/11 - 2015/07 The 1st IEEE International Workshop on Middleware for Cyber Security, Cloud Computing and Internetworking (MidCCI 2015), in conjunction with COMPSAC2015 Program Committee Chair
- 2013/01 - 2015/03 TERENA, Global eduroam Governance Committee Voting member
- 2013/01 - 2015/03 TERENA, Global eduroam Governance Committee 委員
- 2013/11 - 2014/07 The 8th IEEE International Workshop on Middleware Architecture in the Internet (MidArch2014), in conjunction with COMPSAC2014 Program Committee Chair
- 2013/11 - 2014/07 The 8th IEEE International Workshop on Middleware Architecture in the Internet (MidArch2014), in conjunction with COMPSAC2014 Program Committee Chair
- 2010/11 - 2012/12 TERENA, Global eduroam Governance Committee Voting member
- 2010/11 - 2012/12 TERENA, Global eduroam Governance Committee 委員
- 2011/02 - 2011/09 Program Committee Member of Fourth International Workshop on Camera-Based Document Analysis and Recognition (CBDAR2011) Program Committee Member
- 2011/02 - 2011/09 Program Committee Member of Fourth International Workshop on Camera-Based Document Analysis and Recognition (CBDAR2011) Program Committee Member
- 2007/08 - 2007/12 Program Committee Member of 3rd Indian International Conference on Artificial Intelligence Program Committee Member
- 2007/08 - 2007/12 Program Committee Member of 3rd Indian International Conference on Artificial Intelligence Program Committee Member
- 2006/08 - 2006/11 Program Committee Member of Image and Vision Computing New Zealand IVCNZ 2006 Program Committee Member
- 2006/08 - 2006/11 Program Committee Member of Image and Vision Computing New Zealand IVCNZ 2006 Program Committee Member
