![Hiroshi Koyama](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Hiroshi Koyama worked as a Director and Head of Accounting & General Affairs at Nittetsu Mining Co., Ltd. from 2013 to 2017.
| Companies | Position | End |
|---|---|---|
| NITTETSU MINING CO., LTD. | President | 01/04/2021 |
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| Private companies | 1 |
|---|---|
Nittetsu Mining Co., Ltd.
 Nittetsu Mining Co., Ltd. Miscellaneous Commercial ServicesCommercial Services Engages in R&D, limestone, copper mining and non metallic mineral mining services | Commercial Services |
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