| April 1974 |
Joined Nippon Telegraph and Telephone Public Corporation (currently Nippon Telegraph and Telephone Corporation) |
| November 1995 |
Professor, Applied Chemistry Department, Graduate School of Engineering, The University of Tokyo |
| April 2006 |
Director, Synchrotron Radiation Research Organization, The University of Tokyo |
| October 2009 |
Chairman, The Japanese Society for Synchrotron Radiation Research |
| April 2013 |
Project Professor, Synchrotron Radiation Research Organization, The University of Tokyo |
| May 2013 |
Chairman, The surface Science Society of Japan |
| June 2013 |
Emeritus Professor, The University of Tokyo |
| April 2014 |
Project Researcher, Synchrotron Radiation Research Organization, The University of Tokyo |
| March 2015 |
Outside Director, former Showa Denko K.K. |
| April 2015 |
Special Professor, Tokyo City University |
| July 2016 |
Project Researcher, School of Engineering, The University of Tokyo |
| December 2016 |
Project Researcher, Institute for Solid State Physics, The University of Tokyo |
| January 2023 |
Outside Director, Resonac Holdings Corporation |