- Apr. 1982
- Joined Yamashita-Shinnihon Steamship Co., Ltd. (currently Mitsui O.S.K. Lines, Ltd.)
- Apr. 1987
- Joined American Life Insurance Company, Japan Branch (currently MetLife, Inc.)
- Nov. 1992
- Joined Clarke Consulting Group (U.S.)
- Jan. 1995
- Joined Dell Computer Inc. (currently Dell Technologies Japan Inc.)
- Aug. 2000
- Assumed Representative Director, President of Dell Japan Inc. and Vice President of Dell Computer Corporation
- May. 2006
- Assumed Representative Partner of Revamp Corporation
- Apr. 2008
- Assumed Executive Officer, President and Chief Operating Officer of HOYA CORPORATION
- Jun. 2008
- Assumed Director, Executive Officer, President and Chief Operating Officer of HOYA CORPORATION
- Nov. 2011
- Assumed Director, Representative Executive Officer, President and Chief Operating Officer of HOYA CORPORATION
- Mar. 2014
- Assumed Independent Director of the Board of KOKUYO Co., Ltd.
- May. 2015
- Assumed Chairman of the board, Representative Director and CEO of ARUHI Corporation (previous ARUHI Group Corporation)
- Sept. 2015
- Assumed Chairman of the Board, President, Representative Director, CEO and COO of ARUHI Corporation
- Jun. 2021
- Assumed Chairman of the Board, Representative Director, President and CEO of ARUHI Corporation
- Apr. 2022
- Assumed Chairman of the Board and Representative Director of ARUHI Corporation(current position)