| Alan Thomas Pilbeam | Director | 20 Mar 2017 | 10 Aug 2020 | British | 59 years |
| Brodies Secretarial Services Limited | Corporate Secretary | 2 Mar 2016 | 28 Feb 2023 | United Kingdom | - |
| Christiaan Wilhelmus Smulders | Director | 2 Apr 2015 | 15 Jun 2015 | Dutch | 70 years |
| David Andrew Kaye | Director | 10 Aug 2020 | 14 Apr 2023 | British | 64 years |
| Genta Murai | Director | 14 Aug 2020 | 6 Oct 2022 | Japanese | 51 years |
| Ichiro Komura | Director | 3 Sept 2018 | 14 Aug 2020 | Japanese | 63 years |
| Jeffrey John Krijn Hoogesteger | Director | 2 Apr 2015 | 15 Jun 2015 | Dutch | 62 years |
| Julian Cecil Arthur Voge | Director | 25 Mar 2015 | 2 Apr 2015 | British | 68 years |
| Julian Edwards | Director | 15 Jun 2015 | 21 Mar 2017 | British | 57 years |
| Michihiro Nose | Director | 21 Mar 2017 | 3 Feb 2020 | Japanese | 64 years |
| Nobuyuki Kobayashi | Director | 21 Mar 2017 | 3 Sept 2018 | Japanese | 65 years |
| Soichi Nishihara | Director | 6 Oct 2022 | 21 May 2024 | Japanese | 47 years |
| Yasumitsu Tanaka | Director | 14 Aug 2020 | 6 Oct 2022 | Japanese | 57 years |
| Yasushi Shimizu | Director | 24 Apr 2019 | 14 Aug 2020 | Japanese | 57 years |
| Yoshinobu Nakajima | Director | 21 May 2024 | 17 Oct 2025 | Japanese | 46 years |