Chairman and Representative Director Toshifumi Shibuya |
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| 1979 | Apr. | Joined Sumitomo Corporation |
| 2013 | Apr. | Executive Officer, General Manager of Media Business, Sumitomo Corporation |
| 2015 | Apr. | Assistant to the CEO, T-Gaia Corporation |
| Jun. | President and Chief Executive Officer, T-Gaia Corporation | |
| 2017 | Apr. | Chairman, T-Gaia Corporation (current) |
| Jun. | Director, National Association of Mobile Phone Distributors | |
| Jun. | Director, Telecom Services Asssociation (current) | |
| 2018 | Jun. | Chairman, National Association of Mobile Phone Distributors (current) |
