- 2019/04 - 現在 Ritsumeikan University Research Organization of Science and Technology Visiting Professor
- 2019/04 - 現在 Osaka universitiy Cybermedia Center Professor
- 2016/04 - 現在 JPCERT Coordination Center Director
- 2015/04 - 現在 Wireless LAN Certification Organization Representative Director
- 2016/04 - 2019/03 Nara Institute of Science and Technology Graduate of Information Science Visiting Professor
- 2016/04 - 2019/03 Tokyo Denki University School of science and technology for future life Professor
- 2008/03 - 2016/03 Nara Institute of Science and Technology Graduate School of Information Science Associate Professor
- 2004/04 - 2008/02 Japan Science and Technology Agency Research Institute of Science and Technology for Society Researcher
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