Corporate Officers
Outside Director
Tsuyoshi Kameoka
| April 1979 | Joined Shell Sekiyu K.K. (currently Idemitsu Kosan Co., Ltd.) |
| April 2005 | Senior Officer and Kinki Area Manager, Showa Shell Sekiyu K.K. (currently Idemitsu Kosan Co., Ltd.) |
| March 2006 | Executive Officer and Kinki Area Manager |
| November 2008 | Executive Officer and General Manager, Head Office Sales Division |
| March 2009 | Corporate Executive Officer of Marketing Division |
| March 2013 | Executive Officer, Vice President, Oil Business COO |
| March 2015 | President & Representative Director, Group CEO |
| April 2019 | Representative Director, Vice Chairman and Executive Officer, Idemitsu Kosan Co., Ltd. |
| June 2020 | Special Advisor |
| June 2021 | Independent Director, Kawasaki Kisen Kaisha, Ltd. |
| April 2022 | Trustee and Board Member, Kwansei Gakuin University (current position) |
| June 2022 | Outside Director, J-Oil Mills, Inc. (current position) |
| September 2022 | Corporate Advisor, Sojitz Corporation (retired in March 2023) |
| June 2023 | Outside Director, Sojitz Corporation (current position) |