- 2007/04 - 2009/03 日本測地学会34・35期評議員(2007.04-2009.03)
- 2007/04 - 2009/03 日本測地学会34・35期評議員(2007.04-2009.03)
- 2007/04 - 2008/03 東京大学外国人留学生支援基金奨学生選考委員会委員(2007.04-2008.03)
- 2007/04 - 2008/03 東京大学外国人留学生支援基金奨学生選考委員会委員(2007.04-2008.03)
- - 2007/03 東京大学基金による国際交流助成専門委員会委員(2005・4-2007.3)
- - 2007/03 東京大学基金による国際交流助成専門委員会委員(2005・4-2007.3)
- 2003 - 2007 IAG ICCT Work Group, Normal member (2003-2007)
- 2003 - 2007 IAG SSG, Normal member (2003-2007)
- 2003 - 2007 IAG ICCT Work Group, Normal member (2003-2007)
- 2003 - 2007 IAG SSG, Normal member (2003-2007)
- 2007 - IAG Study Group IC-SG7, member (2007-2111)
- 2007 - IAG Study Group IC-SG7, member (2007-2111)
- 2006/10 - 東京大学北京代表所人事検討WG(2006.10-12)
- 2006/10 - 東京大学北京代表所人事検討WG(2006.10-12)
- 2005/04 - 地震研究所国際室運営委員会委員(2005.04-)
- 2005/04 - 地震研究所国際室運営委員会委員(2005.04-)
- 2004 - 東京大学国際交流委員会委員(2004・3-)
- 2004 - 東京大学国際交流委員会委員(2004・3-)
- 1999 - 2003 IAG SSG 4.189, Normal member (1999-2003)
- 1999 - 2003 IAG SSG 4.189, Normal member (1999-2003)
- 2002/04 - Geodetic Society of Japan, Editor for Year Report (2002.4-7)
- 2002/04 - Geodetic Society of Japan, Editor for Year Report (2002.4-7)
- 2001/12 - Journal of Geodesy and Geodynamics, Editor (2001.12-)
- 2001/12 - Journal of Geodesy and Geodynamics, Editor (2001.12-)
- 1997 - Swedish Geophysical Society, Regular member (1997-)
- 1997 - Swedish Geophysical Society, Regular member (1997-)
- 1996 - European Geophysical Society, Regular member (1996-)
- 1996 - European Geophysical Society, Regular member (1996-)
- 1988 - 1993 Japanese Geodetic Society, Regular member (1988-1993, 2000-)
- 1988 - 1993 Japanese Geodetic Society, Regular member (1988-1993, 2000-)
- 1992 - American Geophysical Union, Life member (1992-)
- 1992 - American Geophysical Union, Life member (1992-)