| April | 1976 | Joined Toyo Information Systems Co., Ltd. (currently TIS Inc.) |
| June | 2000 | Director, Toyo Information Systems Co., Ltd. |
| April | 2004 | Executive Director, TIS Inc. |
| April | 2008 | Executive Managing Director, TIS Inc. |
| April | 2010 | Executive Vice President and Representative Director, TIS Inc. |
| April | 2011 | President and Representative Director, TIS Inc. |
| June | 2018 | Chairman, President and Representative Director, TIS Inc. |
| April | 2021 | Chairman and Director of the Company, TIS Inc. (present post) |
| March | 2025 | Director (present post) |