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1. Organizing Committee Chair, ERATO Conference on Quantum Information Science 2003 (EQIS'03), Doshiha Univ., Kyoto, Japan, 2003.

2. Organizing Committee and Program Committee, COE Symposium on Quantum Information Theory. Doshiha Univ., Kyoto, Japan, 2003.

3. Program Committee Vice-Chair, ERATO Conference on Quantum Information Science 2004 (EQIS'04). Hitotsubashi-memorial hall, Tokyo, Japan, 2004.

4. Program Committee Vice-Chair, ERATO Conference on Quantum Information Science 2005 (EQIS'05). JST-Museum Hall, Tokyo, Japan, 2005.

5. Organizing Committee Chair, COE-Kakenhi Workshop on Quantum Information Theory and Quantum Statistical Inference, University of Tokyo, Hongo, Tokyo, (2005)

6. Local Committee: The 8th International Conference on Quantum Communication, Measurement, and Computing(QCMC2006), Tsukuba Epocal, Tsukuba, Japan, 28th November- 3rd Decmeber, (2006).

7. Program Committee, Asian Conference on Quantum Information Science 2006 (AQIS06), Beijing, China, 2006.

8. Technical Program Committee, The First International Workshop on Quantum Security (QSEC2007), Guadeloupe, French Caribbean, France, January 2-6, 2007. Organized by IEEE France and IARIA.

9. Organizing Committee Chair, Special seminar series on quantum information at NII, National Institute of Informatics (NII), Tokyo, February 1 - March 21, 2007.

10. Program Committee, The 3rd Workshop on Theory of Quantum Computation, Communication, and Cryptography (TQC2008), The University of Tokyo, Tokyo Japan, January 30 - February 1, 2008.

11. Technical Program Committee Co-Chair: ICQNM 2008, The Second International Conference on Quantum, Nano, and Micro Technologies , Sainte Luce, Martinique, France, February 10-15, 2008. Organized by IEEE France and IARIA.

12. Main Organizer: GSIS & DEX-SMI Workshop on Quantum statistical inference and entanglement Graduate School of Information Sciences, Tohoku University, 11th-12th, Ferbruary, 2008

13. International Advisory Committee: International School and Conference on Quantum Information (ISCQI - 2008), Institute of Physics (IOP), Bhubaneswar, Orissa, India, March 4th - 12th, 2008

14. Program Committee: Asian Conference on Quantum Information Science 2008 (AQIS08), Souel, Korea, 2008.

15. Organizing Committee: International Workshop on Statistical-Mechanical Informatics 2008 (IW-SMI2008), Sendai, Japan, September 14-17, 2008.

16. Organizing Committee Chair: GSIS Workshop on Quantum Information Theory, Sendai, Japan, November 5-7, 2008

17. Organizing Committee: Multicritical Behaviour of Spin Glasses and Quantum Error Correcting Codes (MBQEC), Centennial Hall, Ookayama campus, Tokyo Institute of Technology, Tokyo, Japan, November 17 - 19, 2008

18. Organizing Committee Chair: DEX-SMI Workshop on Quantum Statistical Inference, National Institute of Informatics (NII), Tokyo, Japan, March 2-4, 2009

19. Program Committee: ICQNM 2009, The Third International Conference on Quantum, Nano and Micro Technologies , Cancun, Mexico, February 1-6, (2009)

20. Program Committee: Workshop on Theory of Quantum Computation, Communication, and Cryptography (TQC2009), Waterloo, Canada, May 11-13, (2009)

21. Program Committee: ICQNM 2010, The Fourth International Conference on Quantum, Nano and Micro Technologies, St. Maarten, Netherlands Antilles, February 10-16, (2010).

22. Special Area Chair: ICQNM 2011, The Fifth International Conference on Quantum, Nano and Micro Technologies, French Riviera, Nice/Saint Laurent du Var, France, August 21-27 (2011)

23. Technical Program Committee: ICQNM 2012, The Sixth International Conference on Quantum, Nano and Micro Technologies, Rome, Italy, August 19 - 24 (2012)

24. Program Committee: 12th Asian Quantum Information Science conference(AQIS'12), School of Physical Science and Technology, Soochow University, Suzhou, China, August 23-26, (2012)
25. Workshop Co-chair: Japan-Singapore Workshop on Multi-user Quantum Networks, Centre for Quantum Technologies, National University of Singapore, Singapore, 17th-20th September (2012)
26. Special Area Chair: ICQNM 2013, The Seventh International Conference on Quantum, Nano and Micro Technologies, Barcelona, Spain, August 25 - 31 (2013)

27. Program Committee: 13th Asian Quantum Information Science conference(AQIS'13), IMSC Chennai, India, August 25-30 (2013)

28. Program Committee:The 7th International Conference on Information Theoretic Security (ICITS), Singapore November, 28-30 (2013)

29. Program Committee:Theory of Quantum Computation, Communication, and Cryptography 2014 (TQC 2014), Singapore May (2014)

30. Program Committee:2014 International Symposium on Information Theory (ISIT), Honolulu, Hawaii, June 29 - July 4 (2014)

31. Program Committee:14th Asian Quantum Information Science conference (AQIS'14), Kyoto, Japan, August 20 - 24, 2014

32. Conference Chair: AJW2014 Australia-Japan Workshop on Muti-user Quantum Networks 2014, UTS, Sydney, Australia, October 22 - 24, 2014

33. Organizer of Organized Session: Classical and Quantum Secure Network, 2014 International Symposium on Information Theory and Its Applications, Melbourne, Australia, 26 - 29, October 2014.

34. Special Area Chair: ICQNM 2014, The Eighth International Conference on Quantum, Nano and Micro Technologies, Lisbon, Portugal, November 16 - 20, 2014

35. Program Committee:Quantum Information Processing (QIP 2015), Sydney January (2015)

36. Program Committee:2015 International Symposium on Information Theory (ISIT), Hong Kong, June 14-19, 2015

37. Special Area Chair: ICQNM 2015, The Ninth International Conference on Quantum, Nano and Micro Technologies, Venice, Italy, August 23 - 28, 2015

38. Program Committee: 2015 IEEE Information Theory Workshop (ITW), Jeju Island, Koreag, October 11-15, 2015

39. Special Area Chair: ICQNM 2016, The Tenth International Conference on Quantum, Nano and Micro Technologies, Nice, France, July 24 - 28, 2016

40. Program Committee: 16th Asian Quantum Information Science conference (AQIS'16), Academia Sinica, Taipei, Taiwan, August 29-September 1, 2016

41. Conference Co-Chair: Beyond I.I.D. in Information Theory 2017, Institute for Mathematical Sciences, National University of Singapore, Singapore, July 24-28, 2017

42. Steering Committee: ICQNM 2017, The Tenth International Conference on Quantum, Nano and Micro Technologies, Rome, Italy, September 10 - 14, 2017.

43. Program Committee: 10th International Conference on Information Theoretic Security (ICITS) Hong Kong, China, on November 29 - December 2, 2017.

44. Program Committee: Quantum Information Processing 2018 (QIP), Aula Congress Centre, the TU Delft, The Netherlands, January 15 - 19, 2018.

45. Program Committee: 2018 International Symposium on Information Theory (ISIT 2018), Vail Cascade, CO, USA, June 17 - 22, 2018.

46. Program Committee: The 13th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC2018), University of Technology, Sydney, July, 16{18, 2018.

47. Program Committee: 2019 International Symposium on Information Theory (ISIT 2019), Maison de la Mutualite, Paris, France, July 7 - 12, 2019.

48. Organizinger Nagoya-SUSTech Quantum Information Workshop, Nagoya University, Nagoya, Japan, April 11-13, 2019

49. Local Organizing Committee: Quantum Information Processing 2020 (QIP), Hilton Shenzhen Shekou Nanhai Hotel, Shenzhen, China, January 6 - 10, 2020.