| Abdulkarim Ahmed Abdulla Mahmoud Almazmi | Director | 1 Jul 2011 | 31 Jul 2016 | Emirian | 67 years |
| Alan Richard Turner | Secretary | 5 Dec 1990 | 6 Sept 1994 | British | - |
| Anne Drinkwater | Director | 1 Jan 2008 | 31 Dec 2008 | British | 70 years |
| Basil Richard Ryland Butler | Director | 14 Jan 1989 | 20 May 1989 | British | 96 years |
| Christopher Kuangcheng Gerald Eng | Secretary | 23 Mar 2009 | 30 Jun 2010 | Other | - |
| Daisuke Urasaki | Director | 26 Jun 2018 | 1 Jun 2020 | Japanese | 63 years |
| David George Dalton | Director | 1 Jul 2004 | 1 Jan 2008 | British | 70 years |
| David George Dalton | Director | 11 Aug 2009 | 1 Oct 2014 | British | 70 years |
| Edward Whitehead | Director | 26 Apr 1994 | 28 Feb 2001 | British | 79 years |
| Firas M. Kaddoura | Director | 1 Mar 2016 | 30 May 2018 | American | 50 years |
| George Leslie Wood | Director | 1 Mar 2012 | 31 Jan 2014 | British | 64 years |
| Graham Rutherford Day | Director | 1 Jun 2007 | 1 Jan 2008 | British | 71 years |
| Graham Rutherford Day | Director | 1 Jan 2008 | 1 Sept 2008 | British | 71 years |
| Guillermo Quintero Ordonez | Director | 1 Sept 2009 | 16 Mar 2010 | Venezuelan | 69 years |
| Hiroshi Mukaibo | Director | 6 Nov 2003 | 20 Apr 2005 | Japanese | 77 years |
| Hiroshige Kono | Director | 24 Jan 2014 | 1 Sept 2017 | Japanese | 57 years |
| Hugh Edward Norton | Director | 20 May 1989 | 26 Apr 1994 | British | 90 years |
| Janet Elvidge | Secretary | 1 Aug 2004 | 1 Feb 2006 | Other | - |
| Jeremy James Pearson | Director | 1 Jan 2008 | 1 Jul 2011 | British | 71 years |
| John Peter Gaffey | Director | 1 Jun 2018 | 10 Mar 2020 | Irish | 56 years |
| John Royston Grundon | Director | 14 Jan 1989 | 5 Nov 1991 | British | 95 years |
| Kazuyoshi Arisaka | Director | 1 Sept 2017 | 1 Jun 2020 | Japanese | 70 years |
| Kazuyoshi Arisaka | Director | 20 Aug 2020 | 31 Dec 2021 | Japanese | 70 years |
| Keiichi Goto | Director | 1 Dec 1995 | 27 Jul 1998 | British | 72 years |
| Kimiharu Chokki | Director | 27 Jul 1998 | 4 Dec 2000 | Japanese | 68 years |
| Kiyotaka Furuhashi | Director | 27 Jul 1998 | 4 Dec 2000 | Japan | 76 years |
| Kohei Yamazoe | Director | 1 Jul 2011 | 24 Jan 2014 | Japanese | 49 years |
| Koji Yamaguchi | Director | 1 Jul 2011 | 1 Feb 2017 | Japanese | 66 years |
| Leonard Jack Brown | Director | 26 Apr 1994 | 30 Nov 2003 | British | 79 years |
| Masaya Mori | Director | 20 Apr 2005 | 1 Aug 2012 | Japanese | 68 years |
| Masaya Mori | Director | 4 Dec 2000 | 6 Nov 2003 | Japanese | 68 years |
| Michael Christopher Daly | Director | 1 Sept 2000 | 1 May 2006 | British | 73 years |
| Michael Edmund Townshend | Director | 1 Apr 2009 | 1 Sept 2009 | British | 68 years |
| Michael Edmund Townshend | Director | 1 Oct 2014 | 12 May 2020 | British | 68 years |
| Mikio Ichikawa | Director | 7 Sept 1994 | 1 Dec 1995 | British | 61 years |
| Mitsuo Tamura | Director | 1 Feb 2017 | 10 Jun 2021 | Japanese | 65 years |
| Mohamed Wagih Shindy | Director | 16 Mar 2010 | 1 Mar 2012 | American | 53 years |
| Nigel John Newby | Director | 1 Feb 1990 | 26 Apr 1994 | British | 78 years |
| Nigel Johnson Goddard | Director | 20 Nov 1998 | 1 Sept 2000 | British | 77 years |
| Nobuo Takayama | Director | 14 Jan 1989 | 3 Jan 1990 | Japanese | 70 years |
| Paul Alan Hughes | Director | 1 Sept 2008 | 16 Mar 2010 | British | 59 years |
| Paul Alan Hughes | Director | 16 Mar 2010 | 28 Sept 2015 | British | 59 years |
| Rex Brown | Director | 14 Jan 1989 | 5 Nov 1991 | British | 95 years |
| Richard Carno Jones | Secretary | 14 Jan 1989 | 5 Dec 1990 | British | - |
| Richard Cunningham Campbell | Director | 14 Jan 1989 | 1 Feb 1990 | British | 60 years |
| Richard Leon Paniguian | Director | 1 Mar 2001 | 1 Jan 2008 | British | 77 years |
| Robert Cameron Cumming | Secretary | 6 Sept 1994 | 31 Mar 2002 | British | - |
| Roy Leslie Tooley | Secretary | 31 Mar 2002 | 1 Aug 2004 | British | - |
| Shunsuke Taniguchi | Director | 28 Nov 1990 | 7 Sept 1994 | Japanese | 84 years |
| Steven Graham Peacock | Director | 1 May 2006 | 1 Apr 2009 | British | 69 years |
| Takashi Sakai | Director | 28 Nov 1990 | 1 Dec 1995 | Japanese | 74 years |
| Takeo Hosoya | Director | 8 Apr 1997 | 4 Dec 2000 | Japanese | 86 years |
| Tatsuro Inahara | Director | 4 Dec 2000 | 20 Apr 2005 | Japanese | 86 years |
| Timothy James Alcock | Director | 1 Jul 2004 | 1 Jun 2007 | Us Citizen | 71 years |
| Tomio Saito | Director | 1 Dec 1995 | 27 Jul 1998 | Japanese | 81 years |
| Wreford Timothy John Digings | Director | 5 Nov 1991 | 20 Nov 1998 | British | 77 years |
| Yasin Stanley Ali | Secretary | 1 Feb 2006 | 23 Mar 2009 | Other | - |
| Yoshiaki Miura | Director | 3 Jan 1990 | 28 Nov 1995 | Japanese | 69 years |
| Yoshikazu Kuroda | Director | 14 Jan 1989 | 28 Nov 1990 | Japanese | 87 years |
| Yoshimitsu Tamura | Director | 14 Jan 1989 | 8 Apr 1997 | Japanese | 94 years |
| Yoshito Yokote | Director | 20 Apr 2005 | 1 Jul 2011 | Japanese | 75 years |
| Yosuke Ueda | Director | 4 Dec 2000 | 12 May 2016 | Japanese | 70 years |
| Yukihiro Hosokawa | Director | 4 Dec 2002 | 6 Nov 2003 | Japanese | 71 years |
| Yuzo Sengoku | Director | 12 May 2016 | 26 Jun 2018 | Japanese | 63 years |