| 2007 -- 2008 | 日本藻類学会 | 評議員 |
| 2005 -- 2006 | 日本藻類学会 | 庶務幹事 |
| 2004 -- 2006 | 日本藻類学会 | 英文誌（Phycological Research) 編集委員 |
| 2000 -- 2005 | 日本藻類学会 | 和文紙編集実行委員 |
| 2012 -- 2014 | International Phycological Society | Phycologia associate editor |
| 2005 -- 2014 | International Phycological Society | International Organizing Commitee |
| 2010 -- 2012 | International Society for Evolutionary Protistology | President |
| 2008 -- 2010 | International Society for Evolutionary Protistology | President elect |
| 2004 -- 2008 | International Society for Evolutionary Protistology | Councilor at large |
| 2004 -- (現在) | International Society of Endocytobiology | Secretary |
| さらに表示... |