Associate Editor: IEEE Transactions on Microwave Theory and Techniques, since June 2010.

Oversea Editor: Japanese Journal of Applied Physics, since Jan. 2010.

Member of IEEE Electron Device Society Compound Semiconductor Devices and ICs Technical Committee, from 2010

Steering committee

  - 2009 Asia-Pacific Workshop on Wide-Bandgap Semiconductors, Zhang Jia Jie, China

Secretary 2009 IEEE International Conference on Electron Devices and Solid-State Circuits (EDSSC2009)

Technical Program Committee:

  - 2012 Int. Workshop on Nitride Semiconductor (IWN 2012)

 - 39th Int. Symp. on Compound Semiconductors (ISCS2012)

 - 2012 Int. Conf. Solid-State Devices and Materials (SSDM2012)

 - 2011 Int. Conf. Solid-State Devices and Materials (SSDM2011)

 - 2010 International Conference on Solid-State and Integrated-Circuit Technology (ICSICT2010)

 - 2010 Int. Conf. Solid-State Devices and Materials (SSDM2010)

 - 2009 Int. Conf. Solid-State Devices and Materials (SSDM2009)

 - 8th Topical Workshop on Heterostructure Microelectronics (TWHM2009)

  - 2008 Int. Electron Device Meeting (IEDM08)

 - 2008 International Conference on Solid-State and Integrated-Circuit Technology (ICSICT2008)

 -  2007 Int. Electron Device Meeting (IEDM07)

 -  2007 Int. Conf. Solid-State Devices and Materials (SSDM2007)

 - 7th Topical Workshop on Heterostructure Microelectronics (TWHM2007)

 - 6th Topical Workshop on Heterostructure Microelectronics (TWHM2005)

 - 2005 Asia-Pacific Workshop on Fundamental and Application of Advanced Semiconductor Devices (AWAD2005)

Reviewer for:

IEEE Electron Device Letters

IEEE Transactions on Electron Devices

IEEE Transactions on Microwave Theory and Techniques

IEEE Microwave and Wireless Components Letters

IEEE Transactions on Advanced Packaging

IEEE Transactions on VLSI Systems

IEEE Transactions on Dielectrics and Electrical Insulation

Applied Physics Letters

Japanese Journal of Applied Physics

Solid State Electronics

IEE Electronics Letters