- 2016/04 - 現在 VLCA一般社団法人可視光通信協会 理事
- 2016/04 - 現在 VLCA一般社団法人可視光通信協会 理事
- 2016 - 現在 電気通信普及財団 審査委員
- 2016 - 現在 藤原科学財団 藤原賞選考委員分科会主査
- 2016 - 現在 電気通信普及財団 審査委員
- 2016 - 現在 藤原科学財団 藤原賞選考委員分科会主査
- 2013/04 - 現在 電子情報通信学会 代議員
- 2013/04 - 現在 電子情報通信学会 代議員
- 2009 - 現在 電子情報通信学会(Communication Society) Fellow
- 2009 - 現在 電子情報通信学会(Communication Society) Fellow
- 2005 - 現在 総務省フォトニックネットワーク開発推進協議会企画部 会長代理
- 2005 - 現在 光協会、ユビキタスネットワーク社会の光技術、産業懇談会 委員
- 2005 - 現在 総務省フォトニックネットワーク開発推進協議会企画部 会長代理
- 2005 - 現在 光協会、ユビキタスネットワーク社会の光技術、産業懇談会 委員
- 2004 - 現在 米国ISOCORE Executive Director for Asia Pacific region Executive Director
- 2004 - 現在 通産省、NEDO、電子情報技術分野の技術ロードマップ 作成委員
- 2004 - 現在 総務省ユビキタス社会の動向に関する調査 調査委員
- 2004 - 現在 総務省21世紀ネットワーク基盤技術研究推進会議 アドホックメンバー
- 2004 - 現在 米国ISOCORE Executive Director for Asia Pacific region Executive Director
- 2004 - 現在 通産省、NEDO、電子情報技術分野の技術ロードマップ 作成委員
- 2004 - 現在 総務省ユビキタス社会の動向に関する調査 調査委員
- 2004 - 現在 総務省21世紀ネットワーク基盤技術研究推進会議 アドホックメンバー
- 2003 - 現在 IEEE International Conference on Information Technology Research and Education, Asia Liason
- 2003 - 現在 IEEE International Conference on Information Technology Research and Education, Asia Liason
- 2002 - 現在 NICTけいはんなオープンラボ技術・調査部会 相互接続性検証ワーキング主査
- 2002 - 現在 NICTけいはんなオープンラボ技術・調査部会 相互接続性検証ワーキング主査
- 2001 - 現在 IEEE Communication Magazine Technical editor
- 2001 - 現在 IEEE Communication Magazine Technical editor
- 2000 - 現在 IEEE Fellow (Communication Society, CPMT society) メンバーシップ
- 2000 - 現在 IEEE Communication Surveys, Broadband Network Area Editor
- 2000 - 現在 IEEE Fellow (Communication Society, CPMT society) メンバーシップ
- 2000 - 現在 IEEE Communication Surveys, Broadband Network Area Editor
- 2015 - iPOP2015 General Chair
- 2015 - iPOP2015 General Chair
- 2012/06 - 2014/05 IEICE IEICE Director, Journal and Transactions
- 2012/06 - 2014/05 電子情報通信学会 編集理事
- 2014 - iPOP2014 General Chair
- 2014 - COIN2014 招待講演
- 2014 - iPOP2014 General Chair
- 2014 - COIN2014 招待講演
- 2013/07 - IEEE High-performance Switching and Routing workshop (HPSR) 2013,Session4 Session chair
- 2013/07 - IEEE High-performance Switching and Routing workshop (HPSR) 2013,Session4 Session chair
- 2013 - iPOP2013 General Chairs
- 2013 - MPLS2013 Technical program Committee Chair
- 2013 - IEEE High-performance Switching and Routing workshop (HPSR) 2013 Technical Program Committee Member
- 2013 - iPOP2013 General Chairs
- 2013 - MPLS2013 Technical program Committee Chair
- 2013 - IEEE High-performance Switching and Routing workshop (HPSR) 2013 Technical Program Committee Member
- 2012 - iPOP2012 General Chairs
- 2012 - MPLS2012 Technical program Committee Chair
- 2012 - IEEE High-performance Switching and Routing workshop (HPSR) 2012 Technical Program Committee Member
- 2012 - iPOP2012 General Chairs
- 2012 - MPLS2012 Technical program Committee Chair
- 2012 - IEEE High-performance Switching and Routing workshop (HPSR) 2012 Technical Program Committee Member
- 2011/12 - 第77回POFコンソーシアム(全体会議) 招待講演
- 2011/12 - 第77回POFコンソーシアム(全体会議) 招待講演
- 2011/08 - 世界ICTカンファレンス2011 招待講演
- 2011/08 - 世界ICTカンファレンス2011 招待講演
- 2010 - 2011/05 IEEE 東京支部 支部長
- 2010 - 2011/05 IEEE 東京支部 支部長
- 2011 - Next Generation Networking Symposium, IEEE GLOBECOM 2011 Technical Program Committee Member
- 2011 - Optical Network System Symposium, IEEE GLOBECOM 2011 Technical Program Committee Member
- 2011 - iPOP2011 Organizing Committee Co-Chair
- 2011 - 1st International Symposium on Access Spaces (IEEE-ISAS 2011) Int. & Local Arrangements Co-Chairs
- 2011 - MPLS2011 Technical program Committee Member
- 2011 - IEEE High-performance Switching and Routing workshop (HPSR) 2011 Technical Program Committee Member
- 2011 - Next Generation Networking Symposium, IEEE GLOBECOM 2011 Technical Program Committee Member
- 2011 - Optical Network System Symposium, IEEE GLOBECOM 2011 Technical Program Committee Member
- 2011 - iPOP2011 Organizing Committee Co-Chair
- 2011 - 1st International Symposium on Access Spaces (IEEE-ISAS 2011) Int. & Local Arrangements Co-Chairs
- 2011 - MPLS2011 Technical program Committee Member
- 2011 - IEEE High-performance Switching and Routing workshop (HPSR) 2011 Technical Program Committee Member
- 2010/07 - COIN2010 招待講演
- 2010/07 - COIN2010 招待講演
- 2010/06 - 日刊工業新聞 スマートグリッド展2010 招待講演
- 2010/06 - 日刊工業新聞 スマートグリッド展2010 招待講演
- 2010/02 - ONDM2010 招待講演
- 2010 - IEEE High-performance Switching and Routing workshop (HPSR) 2010 Technical Program Committee Member
- 2010 - Optical Networking symposium, IEEE GLOBECOM 2010 Technical Program Committee Member
- 2010 - Next Generation Networking symposium, IEEE GLOBECOM 2010 Technical Program Committee Member
- 2010 - MPLS2010 Technical Program Committee Member
- 2010 - iPOP2010 Organizing Committee Co-Chair
- 2010 - IEEE ComSoc Director for Asia/Pacific Region Director
- 2010 - IEEE High-performance Switching and Routing workshop (HPSR) 2010 Technical Program Committee Member
- 2010 - Optical Networking symposium, IEEE GLOBECOM 2010 Technical Program Committee Member
- 2010 - Next Generation Networking symposium, IEEE GLOBECOM 2010 Technical Program Committee Member
- 2010 - MPLS2010 Technical Program Committee Member
- 2010 - iPOP2010 Organizing Committee Co-Chair
- 2010 - IEEE ComSoc Director for Asia/Pacific Region Director
- 2009/11 - 電子情報通信学会 東北支部専門講習会(弘前大学) 招待講演
- 2009/11 - 電子情報通信学会 フェロー フェロー記念講演
- 2009/11 - 電子情報通信学会 東北支部専門講習会(弘前大学) 招待講演
- 2009/11 - 電子情報通信学会 フェロー フェロー記念講演
- 2009 - IEEE High-performance Switching and Routing workshop (HPSR) 2009 Technical Program Committee Member
- 2009 - Next Generation Networking symposium, IEEE GLOBECOM 2009 Technical Program Committee Member
- 2009 - IEEE Globecom 2009, Optical Communication Network and System Symposium Technical Committee Chair
- 2009 - iPOP2009 Organizing Committee Co-Chair
- 2009 - IEEE High-performance Switching and Routing workshop (HPSR) 2009 Technical Program Committee Member
- 2009 - Next Generation Networking symposium, IEEE GLOBECOM 2009 Technical Program Committee Member
- 2009 - IEEE Globecom 2009, Optical Communication Network and System Symposium Technical Committee Chair
- 2009 - iPOP2009 Organizing Committee Co-Chair
- 2006 - 2008 IEEE ComSoc vice-director for Asia/Pacific Region vice-director
- 2006 - 2008 IEEE ComSoc vice-director for Asia/Pacific Region vice-director
- 2008 - Optical Networking symposium, IEEE GLOBECOM 2008 Technical Program Committee Member
- 2008 - High-speed Networking symposium, IEEE Internetional Conference on Communication, (ICC) 2008 Technical Program Committee Member
- 2008 - MPLS2008 Technical Program Committee Member
- 2008 - iPOP2008 Organizing Committee Co-Chair
- 2008 - MPLS2008 Technical program Committee Chair
- 2008 - Optical Networking symposium, IEEE GLOBECOM 2008 Technical Program Committee Member
- 2008 - High-speed Networking symposium, IEEE Internetional Conference on Communication, (ICC) 2008 Technical Program Committee Member
- 2008 - MPLS2008 Technical Program Committee Member
- 2008 - iPOP2008 Organizing Committee Co-Chair
- 2008 - MPLS2008 Technical program Committee Chair
- 2008 - IEEE High-performance Switching and Routing workshop (HPSR) 2008 Technical Program Committee Member
- 2008 - IEEE High-performance Switching and Routing workshop (HPSR) 2008 Technical Program Committee Member
- 2007/07 - Wireless and Optical Communications Networks (WOCN) 2007 Technical Program Co-Chair
- 2007/07 - Wireless and Optical Communications Networks (WOCN) 2007 Technical Program Co-Chair
- 2007/05 - IEEE High-performance Switching and routing (HPSR) 2007 Technical program Committee, Co-Chair
- 2007/05 - IEEE High-performance Switching and routing (HPSR) 2007 Technical program Committee, Co-Chair
- 2005 - 2007 電子情報通信学会通信ソサイエティ,フォトニックネットワーク研究会 委員長
- 2005 - 2007 電子情報通信学会東京支部 評議員
- 2005 - 2007 電子情報通信学会通信ソサイエティ,フォトニックネットワーク研究会 委員長
- 2005 - 2007 電子情報通信学会東京支部 評議員
- 2007 - 電子情報通信学会 英文論文誌B “Special Section on Feature Topics on Latest Trends in Optical Networks” 編集委員
- 2007 - iPOP2007 Organizing Committee Co-Chair
- 2006 - iPOP2006 Organizing Committee Co-Chair
- 2006 - 2006 IEEE SARNOF Symposium 招待講演
- 2006 - Asia-Pacific Optical Communication 2006 招待講演
- 2006 - iPOP2006 Organizing Committee Co-Chair
- 2006 - 2006 IEEE SARNOF Symposium 招待講演
- 2006 - Asia-Pacific Optical Communication 2006 招待講演
- 2005/07 - OECC2005 招待講演
- 2005/07 - OECC2005 招待講演
- 2004 - 2005 IEEE ComSoc Asia Pacific Board Technical Activity Committee, Chair
- 2004 - 2005 IEEE ComSoc Asia Pacific Board Technical Activity Committee, Chair
- 2003 - 2005 電子情報通信学会通信ソサイエティ,フォトニックネットワーク研究会 副委員長
- 2003 - 2005 電子情報通信学会通信ソサイエティ,フォトニックネットワーク研究会 副委員長
- 2005 - iPOP2005 Organizing Committee Chair
- 2005/01 - CPT2005(Eighth International Symposium on Contemporary Photonic Technology) 招待講演
- 2005 - iPOP2005 Organizing Committee Chair
- 2005/01 - CPT2005(Eighth International Symposium on Contemporary Photonic Technology) 招待講演
- 2005 - IEEE High-performance Switching and Routing workshop (HPSR) 2005 Technical Program Committee Member
- 2005 - IEEE High-performance Switching and Routing workshop (HPSR) 2005 Technical Program Committee Member
- 2002 - 2004 電子情報通信学会企画室 幹事
- 2002 - 2004 IEEE CPMT Society、Member at Large Board member
- 2000 - 2004 論文査読委員 委員
- 2000 - 2004 電子情報通信学会論文誌査読委員 委員
- 2000 - 2004 IEEE Transactions on Communication 論文査読委員
- 2000 - 2004 論文査読委員 委員
- 2000 - 2004 電子情報通信学会論文誌査読委員 委員
- 2000 - 2004 IEEE Transactions on Communication 論文査読委員
- 2004 - IEEE Globecom 2004, Optical Communication Network and System Symposium Technical Committee Chair
- 2004 - IEEE HPSR 2004, Technical Program Committee Co-chair
- 2004 - 電子情報通信学会 英文論文誌B「インターネット特集号 IV」 編集委員
- 2004 - IEEE Globecom 2004, Optical Communication Network and System Symposium Technical Committee Chair
- 2004 - IEEE HPSR 2004, Technical Program Committee Co-chair
- 2004 - 電子情報通信学会 英文論文誌B「インターネット特集号 IV」 編集委員
- 2002 - 2003 IEEE ComSoc vice-director for Asia/Pacific Region IEEE ComSoc vice-director
- 2002 - 2003 IEEE ComSoc vice-director for Asia/Pacific Region IEEE ComSoc vice-director
- 2001 - 2003 電子情報通信学会通信ソサイエティ 編集幹事
- 2001 - 2003 電子情報通信学会通信ソサイエティ 編集幹事
- 2000 - 2003 電子情報通信学会通信ソサイエティ国際交流委員会 メンバー
- 2000 - 2003 電子情報通信学会通信ソサイエティ国際交流委員会 メンバー
- 2003 - CPT2003(Eighth International Symposium on Contemporary Photonic Technology) 招待講演
- 2003 - 電子情報通信学会 英文論文誌B「インターネット特集号 III」 編集委員
- 2003 - CPT2003(Eighth International Symposium on Contemporary Photonic Technology) 招待講演
- 2003 - 電子情報通信学会 英文論文誌B「インターネット特集号 III」 編集委員
- 2002 - 2002/10 MPLS2002 Technical program Committee Chair
- 2002 - 2002/10 MPLS2002 招待講演
- 2002 - 2002/05 IEEE HPSR 2002, Technical Program Committee Chair
- 2002 - 2002/05 IEEE HPSR 2002, Technical Program Committee Chair
- 2001 - 2002 ICC2002 High-Speed Networks Symposium Technical program committee member
- 2001 - 2002 First International conference on information technology & applications (ICITA 2002) the International Advisory Committee, member
- 2001 - 2002 IEEE REGION 10 International Conference on Electrical and Electronic Technology (TENCON 2001), International Advisory Committee, member
- 2001 - 2002 ICC2002 High-Speed Networks Symposium Technical program committee member
- 2001 - 2002 First International conference on information technology & applications (ICITA 2002) the International Advisory Committee, member
- 2001 - 2002 IEEE REGION 10 International Conference on Electrical and Electronic Technology (TENCON 2001), International Advisory Committee, member
- 2001 - 2002 International Conference on ATM 2001 招待講演
- 2001 - 2002 International Conference on ATM 2001 招待講演
- 2001 - 2002 International Conference on ATM 2001 招待講演
- 2000 - 2002 IEEE Region 10, Asia Pacific Board, Technical Activity Committee chair
- 2000 - 2002 IEEE Region 10, Asia Pacific Board Technical Activity Committee, chair
- 2000 - 2002 電子情報通信学会企画室 メンバー
- 2000 - 2002 IEEE Region 10, Asia Pacific Board, Technical Activity Committee chair
- 2000 - 2002 IEEE Region 10, Asia Pacific Board Technical Activity Committee, chair
- 2000 - 2002 電子情報通信学会企画室 メンバー
- 2002 - IEEE High-performance switching and routing (HPSR) jointly with ATM workshop 2000, Technical Program Committee Co-Chair
- 2002 - EURASIA-ICT 2002 International Program Committee member
- 2002 - Optical networking symposium, IEEE GLOBECOM 2002 Technical Program Committee Member
- 2002 - Workshop on Optical Internet and photonic switch, COIN+PS2002 Technical Program Committee Member
- 2002 - IEEICC2002, High-speed Network symposium, Session F05, Session chair
- 2002 - IEEICC2002, High-speed Network symposium, Session F08, Session chair
- 2002 - IEEICC2002, High-speed Network symposium, Session F08, 招待講演
- 2002 - IEEE High-performance switching and routing (HPSR) jointly with ATM workshop 2000, Technical Program Committee Co-Chair
- 2002 - EURASIA-ICT 2002 International Program Committee member
- 2002 - Optical networking symposium, IEEE GLOBECOM 2002 Technical Program Committee Member
- 2002 - Workshop on Optical Internet and photonic switch, COIN+PS2002 Technical Program Committee Member
- 2002 - IEEICC2002, High-speed Network symposium, Session F05, Session chair
- 2002 - IEEICC2002, High-speed Network symposium, Session F08, Session chair
- 2002 - IEEICC2002, High-speed Network symposium, Session F05, 招待講演
- 2002 - IEEICC2002, High-speed Network symposium, Session F08, 招待講演
- 2002 - High-speed Network symposium, IEEE GLOBECOM 2002 Technical Program Committee Member
- 2002 - High-speed Network symposium, IEEE GLOBECOM 2002 Technical Program Committee Member
- 2002 - IEEICC2002, High-speed Network symposium, Session F05, 招待講演
- 2002 - IEEICC2002, High-speed Network symposium, Session F05, 招待講演
- 2001 - 2001/09 電子情報通信学会通信ソサイエティ大会シンポジウム座長, 8B-13, 「フォトニックネットワークにおける制御技術」 座長
- 2001 - 2001/09 電子情報通信学会通信ソサイエティ大会シンポジウム座長, 8B-13, 「フォトニックネットワークにおける制御技術」 座長
- 1999 - 2001 電子情報通信学会英文論文誌 Editor
- 1999 - 2001 電子情報通信学会英文論文誌 編集副委員長
- 2001 - IEEE TEBNCOMN 2001 Technical Advisory Committee member
- 2001 - International Conference on Wireless LANs, PANs and Home Networks 2001 Technical Program Committee member
- 2001 - MDM 2001 International Conference on Mobile Data Management Program Committee member
- 2001 - ICATM2001 Technical Program Committee member
- 2001 - ICATM2001 Session D2 Session Chair
- 2001 - IEEE ICC01, business application session Session organizer
- 2001 - ICATM2001 Tutorial 招待講演
- 2001 - ICATM2001 Session D2 招待講演
- 2001 - IEEE ICC01, business application session 招待講演
- 2001 - 電子情報通信学会 英文論文誌B「インターネット特集号」 編集委員
- 2001 - IEEE TEBNCOMN 2001 Technical Advisory Committee member
- 2001 - International Conference on Wireless LANs, PANs and Home Networks 2001 Technical Program Committee member
- 2001 - MDM 2001 International Conference on Mobile Data Management Program Committee member
- 2001 - ICATM2001 Technical Program Committee member
- 2001 - ICATM2001 Session D2 Session Chair
- 2001 - IEEE ICC01, business application session Session organizer
- 2001 - ICATM2001 Tutorial 招待講演
- 2001 - ICATM2001 Session D2 招待講演
- 2001 - IEEE ICC01, business application session 招待講演
- 2001 - 電子情報通信学会 英文論文誌B「インターネット特集号」 編集委員
- 2001 - IEEE HPSR 01 Technical Program Committee member
- 2001 - 4th MPLS 2001 Technical Program Committee member
- 2001 - IEEE HPSR 01 Technical Program Committee member
- 2001 - 4th MPLS 2001 Technical Program Committee member
- 2000 - IEEE ICC 00 TPC member (Asia Pacific representative)
- 2000 - IEEE ICC 00, business application session, "3 rd Generation mobile communication systems in Asia Pacific Regions," Session organizer
- 2000 - IEEE ICC 00 TPC member (Asia Pacific representative)
- 2000 - IEEE ICC 00, business application session, "3 rd Generation mobile communication systems in Asia Pacific Regions," Session organizer
- 2000 - IEEE GLOBECOM 2000 Service Portability Workshop Technical Program Committee member
- 2000 - IEEE GLOBECOM 2000 Service Portability Workshop Technical Program Committee member
- 1999 - IEEE Symposium on Computers and Communications, ISCC‘99 Publicity Committee member
- 1999 - European Conference on Circuit Theory and Design, ECCTD’99 招待講演
- 1999 - 電子情報通信学会 英文論文誌B「ATM特集号」 (IEICE/IEEE 共同特集) 編集委員
- 1999 - IEEE Symposium on Computers and Communications, ISCC‘99 Publicity Committee member
- 1999 - European Conference on Circuit Theory and Design, ECCTD’99 招待講演
- 1999 - 電子情報通信学会 英文論文誌B「ATM特集号」 (IEICE/IEEE 共同特集) 編集委員
- 1999 - IEEE Mobile Data Access, MDA’99 Technical Program Committee member
- 1999 - IEEE Mobile Data Access, MDA’99 Technical Program Committee member