| Andrew Martin Pollins | Director | 1 Jul 2020 | 30 Jun 2021 | British | 59 years |
| Andrew Wilson Garner | Director | 1 Jul 2021 | 31 Dec 2021 | British | 64 years |
| David George Alcock | Director | 11 May 2018 | 31 Jan 2022 | British | 61 years |
| Graeme Robert York | Director | 2 May 2014 | 31 Jan 2015 | Australian | 65 years |
| Guy Marie Numa Joseph Ghislain Richelle | Director | 2 May 2014 | 1 Mar 2017 | Belgian | 71 years |
| Hiromu Kayamori | Director | 16 Nov 2017 | 31 Mar 2019 | Japanese | 54 years |
| Hiroyuki Koga | Director | 2 May 2014 | 9 Sept 2014 | Japanese | 66 years |
| Isao Kajimura | Director | 6 Oct 2015 | 31 Mar 2019 | Japanese | 57 years |
| Isao Kajimura | Director | 5 Jan 2018 | 31 Mar 2019 | Japanese | 57 years |
| Jaideep Singh Sandhu | Director | 1 Feb 2015 | 28 Sept 2018 | Indian | 60 years |
| Makoto Ichikawa | Director | 1 Apr 2019 | 4 Aug 2022 | Japanese | 54 years |
| Nicola Elizabeth Anne Lovett | Director | 18 Oct 2019 | 30 Jun 2021 | British | 57 years |
| Paulo Jorge Tavares Almirante | Director | 21 Mar 2016 | 1 Feb 2018 | Portuguese | 62 years |
| Ro Okaniwa | Director | 4 Jul 2014 | 15 Nov 2017 | Japanese | 63 years |
| Robert John Wells | Director | 1 Feb 2022 | 12 Jul 2024 | British | 46 years |
| Roger Derek Simpson | Secretary | 2 May 2014 | 31 May 2017 | - | - |
| Ryu Nakakomi | Director | 14 Jun 2022 | 21 Aug 2024 | Japanese | 48 years |
| Sarah Jane Gregory | Director | 21 Oct 2018 | 30 Jun 2021 | British | 61 years |
| Sarah Jane Gregory | Secretary | 1 Jun 2017 | 30 Jun 2021 | - | - |
| Shankar Krishnamoorthy | Director | 2 May 2014 | 21 Mar 2016 | Indian | 66 years |
| Simon David Pinnell | Director | 8 May 2018 | 31 Jul 2020 | British | 62 years |
| Stephen Riley | Director | 2 May 2014 | 31 Dec 2015 | British | 65 years |
| Tadafumi Kawaguchi | Director | 1 Jul 2021 | 13 Jun 2022 | Japanese | 53 years |
| Takashi Matsuo | Director | 2 May 2014 | 23 Jul 2014 | Japanese | 67 years |
| Takayuki Nagaoka | Director | 5 Aug 2022 | 5 Apr 2023 | Japanese | 57 years |
| Tatsuhiro Sato | Director | 23 Jul 2014 | 1 Jul 2016 | Japanese | 66 years |
| Teruo Wakahara | Director | 1 Apr 2019 | 30 Jun 2021 | Japanese | 57 years |
| Wilfrid John Petrie | Director | 21 Mar 2016 | 21 Oct 2019 | British | 61 years |
| Yasutaka Fukumori | Director | 1 Jul 2016 | 5 Jan 2018 | Japanese | 59 years |