- 
2025.5 - 2025.11
 
IEEE
Technical Program Committee for APCC2025 
- 
2024.8 - 2025.2
 
IEEE
Technical Program Committee for ICNC2025 
- 
2024.6 - 2037.6
 
IEICE
 
- 
2023.11 - 2024.11
 
IEEE
Technical Program Committee for APCC2024 
- 
2023.8 - 2024.6
 
IEEE
Technical Program Committee for ICC2024 
- 
2023.6 - 2024.2
 
IEEE
Technical Program Committee for ICNC2024 
- 
2023.5 - 2023.11
 
IEEE
Technical Program Committee for APCC2023 
- 
2023.1 - 2024.12
 
IEEE
IEEE Japan Council Treasurer 
- 
2023.1 - 2024.12
 
IEEE
IEEE Tokyo Section Treasurer 
- 
2022.7 - 2022.9
 
IEEE
Technical Program Committee for VTC2022-Fall 
- 
2022.6 - 2024.6
 
IEICE
 
- 
2022.6 - 2023.5
 
IEEE
Technical Program Committee for ICC2023 
- 
2022.4 - 2022.9
 
IEEE
Technical Program Committee for PIMRC 2022 
- 
2021.7 - 2022.6
 
IEEE
Track Co-Chair of Multiple Antennas and Cooperative Communications Track for VTC2022-Spring 
- 
2021.6 - 2022.5
 
IEEE
Technical Program Committee for ICC2022 
- 
2021.5 - 2021.9
 
IEEE
Lead Track Co-Chair of Emerging technologies, 5G and beyond Track for VTC2021-Fall 
- 
2021.2 - 2021.9
 
IEEE
Technical Program Committee for PIMRC 2021 
- 
2020.8 - 2021.4
 
IEEE
Technical Program Committee for WCNC 2021 
- 
2020.7 - 2020.10
 
WPMC2020
Technical Program Committee for WPMC 2020 
- 
2020.6 - 2021.6
 
IEEE
Technical Program Committee for ICC2021 
- 
2020.6 - 2021.4
 
IEEE
Lead Track Co-Chair of Spectrum Management, Radio Access Technology, Services and Security Track for VTC2021-Spring 
- 
2020.4 - 2020.8
 
IEEE
Technical Program Committee for APWCS2020 
- 
2019.11 - 2020.9
 
IEEE
Technical Program Committee for PIMRC 2020 
- 
2019.9 - 2020.6
 
IEEE
Technical Program Committee for ICC2020 
- 
2019.7 - 2020.4
 
IEEE
Technical Program Committee for WCNC 2020 
- 
2019.7 - 2020.5
 
IEEE
Technical Program Committee for VTC2020-Spring 
- 
2019.6 - 2019.9
 
IEEE
Technical Program Committee for VTC2019-Fall 
- 
2019.4 - 2019.11
 
IEEE
Technical Program Committee for APCC2019 
- 
2019.4 - 2019.8
 
IEEE
Technical Program Committee for APWCS2019 
- 
2019.3 - 2019.9
 
IEEE
Technical Program Committee for PIMRC 2019 
- 
2018.10 - 2019.5
 
IEEE
Technical Program Committee for VTC2019-Spring 
- 
2018.9 - 2019.5
 
IEEE
Technical Program Committee for ICC2019 
- 
2018.6 - 2020.6
 
IEICE
 
- 
2018.6 - 2018.11
 
IEEE
Technical Program Co-chair for ISPACS2018 
- 
2018.3 - 2018.8
 
IEEE
Technical Program Committee for VTC2018-Fall 
- 
2018.2 - 2018.8
 
IEEE
Technical Program Committee for APWCS2018 
- 
2018.1 - 2018.9
 
IEEE
Technical Program Committee for PIMRC 2018 
- 
2017.7 - 2018.4
 
IEEE
Technical Program Committee for WCNC 2018 
- 
2017.7 - 2018.5
 
IEEE
Technical Program Committee for ICC2018 
- 
2017.6 - 2018.6
 
IEEE
Track Co-Chair of Radio Access Technology and Heterogeneous Networks Track for VTC2018-Spring 
- 
2017.2 - 2018.3
 
IEICE
Guest Associate Editor for IEICE Trans. Commun. Special Section on Wireless Distributed Networks for IoT Era 
- 
2017.2 - 2017.8
 
IEEE
Technical Program Committee for APWCS2017 
- 
2017.1 - 2017.9
 
IEEE
Technical Program Committee for VTC2017-Fall 
- 
2017.1 - 2017.6
 
IEEE
Technical Program Committee for VTC2017-Spring 
- 
2016.6 - 2017.3
 
IEEE
Technical Program Committee for WCNC 2017 
- 
2016.6 - 2017.7
 
IEEE
Publications Co-Chair for SPAWC2017 
- 
2016.4 - 2016.8
 
IEEE
Technical Program Committee for APCC2016 
- 
2016.3 - 2016.9
 
IEEE
Technical Program Committee for VTC2016-Fall 
- 
2016.1 - 2016.5
 
IEEE
Technical Program Committee for VTC2016-Spring 
- 
2016.1 - 2016.8
 
IEEE
Technical Program Committee (TPC) Chair for APWCS2016 
- 
2015.7 - 2016.4
 
IEEE
Technical Program Committee for WCNC 2016 
- 
2015.7 - 2016.5
 
IEEE
Technical Program Committee for ICC2016 
- 
2015.6 - 2017.5
 
IEICE
Editor of IEICE Transactions on Communications 
- 
2015.4 - 2015.12
 
IEEE
Technical Program Committee for GLOBECOM 2015 
- 
2015.4 - 2015.8
 
IEEE
Technical Program Committee for APWCS2015 
- 
2015.2 - 2015.12
 
IEEE
Technical Program Committee for ICSPCS 2015 
- 
2015.1 - 2015.9
 
IEEE
Technical Program Committee for VTC2015-Fall 
- 
2014.12 - 2015.5
 
IEEE
Technical Program Committee for VTC2015-Spring 
- 
2014.12 - 2015.10
 
IEEE
Technical Program Committee for APCC2015 
- 
2014.7 - 2015.3
 
IEEE
Technical Program Committee for WCNC 2015 
- 
2014.4 - 2014.9
 
IEEE
Technical Program Committee for PIMRC2014-WDN-CN 
- 
2014.2 - 2014.12
 
IEEE
Technical Program Committee for ICSPCS 2014 
- 
2014.2 - 2014.11
 
IEEE
Technical Program Committee for ICCS 2014 
- 
2014.2 - 2014.10
 
IEEE
Technical Program Committee for ATC'14 
- 
2014.1 - 2014.9
 
IEEE
Technical Program Committee for VTC2014-Fall 
- 
2013.12 - 2015.6
 
IEEE
Symposium Co-chair of Green Communications and Computing Track for ICC 2015 
- 
2013.12 - 2014.8
 
IEEE
Technical Program Committee for APWCS2014 
- 
2013.11 - 2014.8
 
IEEE
Technical Program Committee for APWiMob 2014 
- 
2013.10 - 2014.5
 
IEEE
Technical Program Committee for VTC2014-Spring 
- 
2013.9 - 2014.4
 
IEEE
Technical Program Committee for WCNC 2014 
- 
2013.7 - 2014.6
 
IEEE
Technical Program Committee for ICC 2014 
- 
2013.5 - 2022.6
 
IEICE
 
- 
2013.5 - 2013.8
 
IEEE
Technical Program Committee for APCC2013 
- 
2013.5 - 2013.9
 
IEEE
Technical Program Committee for PIMRC2013-WDN-CN 
- 
2013.2 - 2013.8
 
IEEE
Technical Program Committee for APWCS2013 
- 
2013.1 - 2015.12
 
IEEE
VTS Japan Chapter Treasurer 
- 
2013.1 - 2013.9
 
IEEE
Technical Program Committee for VTC2013-Fall 
- 
2012.12 - 2013.10
 
IEEE
Technical Program Committee for WCSP2013 
- 
2012.7 - 2012.12
 
IEEE
Technical Program Committee for GLOBECOM 2012 Workshop: Multicell Cooperation 
- 
2012.6 - 2013.4
 
IEEE
Technical Program Committee for WCNC 2013 
- 
2012.5 - 2012.8
 
IEEE
Technical Program Committee for Chinacom2012 
- 
2012.5 - 2012.10
 
IEEE
Technical Program Committee for WCSP 2012 
- 
2012.4 - 2012.8
 
IEEE
Technical Program Committee for ICCC2012 
- 
2012.4 - 2012.9
 
IEEE
Technical Program Committee for PIMRC 2012 
- 
2012.3 - 2019.12
 
APSIPA
APSIPA Wireless Communications and Networking (WCN) Technical Committee 
- 
2012.3 - 2013.6
 
IEICE
Guest Editor-in-Chief for IEICE Trans. Commun. Special Section on Heterogeneous Networks for Future Cellular Systems 
- 
2012.2 - 2012.12
 
IEEE
Technical Program Committee for GLOBECOM 2012 
- 
2012.2 - 2012.9
 
IEEE
Technical Program Committee for VTC2012-Fall 
- 
2012.1 - 2012.8
 
IEEE
Technical Program Committee for APWCS2012 
- 
2011.6 - 2011.10
 
APSIPA 2011
Technical Program Committee for APSIPA 2011 
- 
2011.5 - 2012.4
 
MIC-CSP
Technical Program Committee for MIC-CSP2012 
- 
2011.3 - 2011.9
 
IEEE
Technical Program Committee for VTC2011-Fall 
- 
2011.2 - 2012.6
 
IEEE
Technical Program Committee for ICC 2012 
- 
2011.1 - 2011.5
 
The first international workshop on cooperative multi-point transmission (IWCoMP)
Organizer 
- 
2011.1 - 2011.8
 
IEEE
Technical Program Committee for APWCS2011 
- 
2010.12 - 2012.5
 
IEEE
Track Co-Chair of Cooperative Communications, distributed MIMOs and Relaying Track for VTC2012-Spring 
- 
2010.12 - 2011.12
 
IEEE
Technical Program Committee for GLOBECOM 2011 
- 
2010.10 - 2011.8
 
Chinacom 2011
Wireless Communications and Networking Symposium Co-chair 
- 
2010.9 - 2011.12
 
IEICE
Guest Associate Editor for IEICE Trans. Commun. Special Section on Cooperative Communications for Cellular Networks 
- 
2010.8 - 2011.5
 
IEEE
Technical Program Committee for VTC2011-Spring 
- 
2010.7 - 2016.7
 
Hindawi ISRN Communications
Editorial board of ISRN Communications 
- 
2010.5 - 2013.5
 
IEICE
 
- 
2010.5 - 2011.5
 
IEICE
 
- 
2010.5 - 2011.5
 
IEICE
 
- 
2010.4 - 2011.6
 
IEEE
Technical Program Committee for ICC 2011 
- 
2010.3 - 2010.11
 
IEEE
Technical Program Committee for ICCS 2010 
- 
2010.1 - 2010.5
 
IEEE
Technical Program Committee for APWCS'10 
- 
2010.1 - 2010.9
 
IEEE
Technical Program Committee for VTC2010-Fall 
- 
2009.10 - 2010.12
 
APSIPA 2010
Technical Program Committee for APSIPA 2010 
- 
2009.9 - 2010.12
 
IEICE
Guest Associate Editor for IEICE Trans. Commun. Special Section on Wireless Distributed Networks 
- 
2009.9 - 2010.10
 
WPMC2010
Technical Program Committee for WPMC 2010 
- 
2009.6 - 2009.9
 
IEEE
Technical Program Committee for PIMRC2009 
- 
2009.5 - 2013.5
 
IEICE
 
- 
2009.5 - 2010.9
 
IEEE
Technical Program Committee for VTC2010-Spring 
- 
2009.3 - 2009.8
 
IEEE
Technical Program Committee for APWCS'09 
- 
2009.3 - 2010.6
 
IEEE
Technical Program Committee for ICC 2010 
- 
2009.2 - 2010.12
 
IEEE
Technical Program Committee for GLOBECOM 2010 
- 
2009.2 - 2009.10
 
IEEE
Technical Program Committee for APSIPA 2009 
- 
2009.2 - 2009.9
 
WPMC2009
Technical Program Committee for WPMC 2009 
- 
2008.7 - 2009.12
 
IEEE
Technical Program Committee for GLOBECOM 2009 
- 
2008.6 - 2009.4
 
IEEE
Technical Program Committee for WCNC 2009 
- 
2008.5 - 2009.5
 
IEICE
Guest Editor for IEICE Trans. Commun. Special Section on "Radio Access Techniques for 3G Evolution" 
- 
2008.1 - 2009.6
 
IEEE
Technical Program Committee for ICC 2009 
- 
2008.1 - 2008.8
 
IEEE
Technical Program Committee for APWCS'08 
- 
2008.1 - 2008.8
 
MIC-CCA
Technical Program Committee for MIC-CCA 2008 
- 
2007.10 - 2008.12
 
IEEE
Technical Program Committee for GLOBECOM 2008 
- 
2007.7 - 2008.5
 
IEEE
Technical Program Committee for ICC'2008 
- 
2007.5 - 2010.5
 
IEICE