| Director of Securities Business Operator TONTAN CORPORATION INVESTMENT ADVISORY SECURITIES , CO.,LTD. | 03/02/2017 | |
| Fundamental Investment Analyst on Securities | 01/01/2023 | 31/12/2024 |
| Manager of Securities Business Operator TONTAN CORPORATION INVESTMENT ADVISORY SECURITIES , CO.,LTD. | 04/10/2016 | |