| 1994-1996 | JSPS Fellow |
| 1996-2006 | Research Associate at Research Center for Prediction of Earthquakes and Volcanic Eruptions, Faculty of Science, Tohoku University |
| 2006-2007 | Research Scientist at Institute for Research on Earth Evolution (IFREE), Japan Agency for Marine-Earth Science and Technology (JAMSTEC) |
| 2007-present | Senior Scientist at IFREE, JAMSTEC |
| 2007-2008 | Visiting associate professor at ERI, Univ. Tokyo |
| 1997-1998 | Meeting & Plannnig Committee Member, Seis. Soc. Japan |
| 1999-2007 | Advisery Committee Member, Study of the Earth's Deep Interior, IUGG |
| 2007-2011 | Vice chair, Study of the Earth's Deep Interior, IUGG |
| 2003-2006 | Associate editor, J. Seis. Soc. Japan (Zisin) |
| 2006-present | Associate editor, Special issue for J. Seis. Soc. Japan (Zisin) |