- 2019/01 - 現在 International Glaciological Society Associate Chief Editor, Journal of Glaciology
- 2004/01 - 現在 HU, Institute of Low Temperature Science Member of the Faculty Council
- 2004/01 - 現在 HU, Institute of Low Temperature Science Member of the Steering Committee
- 2017/06 - 2019/05 Japanese Society of Snow and Ice Scientific Editor, Bulletin of Glaciological Research
- 1998/01 - 2018/12 International Glaciological Society Scientific Editor, Journal of Glaciology
- 2014/04 - 2018/03 HU, Graduate School of Environmental Science Member of the EPEES Steering Committee
- 2008/01 - 2017/10 International Glaciological Society Member of the Publications Committee
- 2016/04 - 2017/03 HU, Institute of Low Temperature Science Chief Editor, Low Temperature Science Vol. 75
- 2015/03 - 2015/12 HU, Institute of Low Temperature Science Head of the Local Organizing Committee, Int'l Symposium on Low Temperature Science
- 2007/06 - 2015/06 International Association of Cryospheric Sciences Head of the Division "Planetary and Other Ices in the Solar System"
- 2005/01 - 2014/12 International Glaciological Society Member of the Nominations Committee
- 2013/04 - 2014/06 National Institute of Polar Research / Elsevier Guest Editor, Polar Science
- 2012/11 - 2014/06 European Geosciences Union Guest Editor, Climate of the Past and The Cryosphere
- 2010/01 - 2011/08 International Glaciological Society Scientific Editor, Annals of Glaciology 52(58)
- 2007/01 - 2011/06 European Geosciences Union Scientific Editor, The Cryosphere
- 2010/06 - 2010/08 International Glaciological Society Co-opted Council Member
- 2005/12 - 2006/06 International Glaciological Society Co-opted Council Member
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Japan Geoscience Union
, American Geophysical Union
, European Geosciences Union
, International Glaciological Society