| 1990-10 | Joined Ohta Showa LLC（Currently known as Ernst & Young ShinNihon LLC） |
| 1994-05 | Registered as Certified Public Accountant |
| 1998-12 | Left Ohta Showa LLC（Currently known as Ernst & Young ShinNihon LLC） |
| 1999-01 | Representative of Partners General Office of Partners Inc. |
| 2000-06 | Representative Director of Partners Consulting, Inc |
| 2008-04 | Representative Director of Global Partners Consulting, Inc.（Present) |
| 2014-06 | External Auditor of SBI Holdings, Inc（Present) |
