| QUILL, Shaun Michael ACTIVE | Director | 01 Apr 2015 | | England | June 1964 | Jeol House, Silver Court, Watchmead, Welwyn Garden City, Hertfordshire, AL7 1LT, England |
| SAKAI, Taishi ACTIVE | Director | 01 Apr 2026 | | Belgium | October 1976 | Jeol House, 1-2 Silver Court, Watchmead, Welwyn Garden City, Hertfordshire, AL7 1LT, England |
| ASANUMA, Mikio RESIGNED | Secretary | 01 Jul 2008 | 31 Mar 2013 | | | 26, Avenue De Grignon, Beynes, 78650, France |
| ISHIDA, Norimasa RESIGNED | Secretary | 28 Apr 2004 | 01 Aug 2007 | | | 2-19-3 Sakuragaoka, Tama-Shi, Tokyo 206-0013, FOREIGN, Japan |
| ISHIDA, Norimasa RESIGNED | Secretary | 02 Oct 1992 | 24 Nov 1994 | | | 23 Canons Drive, Edgware, Middlesex, HA8 7RB |
| MORITA, Tsutomu RESIGNED | Secretary | 01 Aug 2007 | 01 Jul 2008 | | | 3-4-1-108 Kamikitazawa, Setagaya, Tokyo 156-0057, FOREIGN, Japan |
| NOZAWA, Tomio RESIGNED | Secretary | 01 Apr 2001 | 28 Apr 2004 | | | 15 Woodside Grange, 77 Holden Road, London, N12 7DP |
| SAKANASHI, Shinsuke RESIGNED | Secretary | 24 Nov 1994 | 01 Mar 1996 | | | 8 Haywood Park, Chorleywood, Rickmansworth, Hertfordshire, WD3 5DR |
| SUZUKI, Toshihito RESIGNED | Secretary | | 02 Oct 1992 | | | 35 Hale Drive, Mill Hill, London, NW7 3EL |
| TAKASAKA, Masashi RESIGNED | Secretary | 01 Mar 1996 | 30 Mar 2001 | | | 285a Gateshead Road, Borehamwood, Hertfordshire, WD6 5HY |
| ASANUMA, Mikio RESIGNED | Director | 01 Jul 2008 | 01 Apr 2011 | France | April 1945 | 26, Avenue De Grignon, Beynes, 78650, France |
| FUKUYAMA, Koichi RESIGNED | Director | 01 Apr 2014 | 31 Mar 2016 | Japan | July 1959 | Jeol House, Watchmead, Welwyn Garden City, Hertfordshire, AL7 1LT, England |
| FUSE, Akio RESIGNED | Director | 01 Mar 1996 | 01 Apr 1997 | | September 1940 | 1-436 Ogawa-Machi, Kodairi-Shi Tokyo, Japan, FOREIGN |
| HEPBURN, Michael John RESIGNED | Director | | 31 Mar 2010 | United Kingdom | September 1947 | 180 Tavistock Road, Fleet, Hampshire, GU51 4HG |
| ISHIDA, Norimasa RESIGNED | Director | 01 Apr 2002 | 01 Aug 2007 | | December 1947 | 2-19-3 Sakuragaoka, Tama-Shi, Tokyo 206-0013, FOREIGN, Japan |
| ISHIDA, Norimasa RESIGNED | Director | | 24 Nov 1994 | | December 1947 | 23 Canons Drive, Edgware, Middlesex, HA8 7RB |
| KANAYAMA, Toshihiko RESIGNED | Director | 01 Jun 2020 | 31 Mar 2023 | France | December 1966 | Jeol House, Silver Court, Watchmead, Welwyn Garden City, Hertfordshire, AL7 1LT, England |
| KOBAYASHI, Akihiro RESIGNED | Director | 01 Apr 2016 | 01 Jun 2020 | France | April 1960 | Riverbank House, 2 Swan Lane, London, EC4R 3TT |
| KOBAYASHI, Masayuki RESIGNED | Director | 01 Apr 2023 | 31 Mar 2026 | France | July 1960 | Jeol House, 1-2 Silver Court, Watchmead, Welwyn Garden City, Hertfordshire, AL7 1LT, England |
| MATSUMOTO, Yuichi RESIGNED | Director | 01 Apr 2010 | 31 Mar 2013 | England | June 1961 | Jeol House, Silver Court, Watchmead, Welwyn Garden City, Hertfordshire, AL7 1LT, United Kingdom |
| MORITA, Tsutomu RESIGNED | Director | 01 Apr 2011 | 01 Apr 2014 | France | August 1949 | Jeol (Europe) Sas, Espace Claude Monet 1, 1 Allee De Giverny, Croissy-Sur-Seine, 78290, France |
| MORITA, Tsutomu RESIGNED | Director | 01 Aug 2007 | 01 Jul 2008 | | August 1949 | 3-4-1-108 Kamikitazawa, Setagaya, Tokyo 156-0057, FOREIGN, Japan |
| MURAKAMI, Shuichi RESIGNED | Director | | 01 Oct 1994 | | March 1942 | 5-2-1 501 Nakaarai, Tokorozawa-Shi, Saitama 359, FOREIGN, Japan |
| MURRAY, George Ernest RESIGNED | Director | | 31 Mar 1998 | | July 1945 | 85 Beaufoys Avenue, Ferndown, Dorset, BH22 9RN |
| NOZAWA, Tomio RESIGNED | Director | 01 Apr 2001 | 31 Oct 2002 | | November 1947 | 15 Woodside Grange, 77 Holden Road, London, N12 7DP |
| SAKANASHI, Shinsuke RESIGNED | Director | 24 Nov 1994 | 01 Mar 1996 | | April 1944 | 8 Haywood Park, Chorleywood, Rickmansworth, Hertfordshire, WD3 5DR |
| SHINAGAWA, Hiroshi RESIGNED | Director | | 23 Dec 1994 | | June 1943 | 118 Hale Lane, Mill Hill, London, NW7 3SE |
| SUZUKI, Toshihito RESIGNED | Director | | 02 Oct 1992 | | March 1950 | 35 Hale Drive, Mill Hill, London, NW7 3EL |
| TACHIBANA, Nobuhiro RESIGNED | Director | 01 Apr 1997 | 03 Jul 2000 | | December 1939 | 4-40-8 Nishisuna-Machi, Tachikawa-Shi, Tokyo, FOREIGN, Japan |
| TAKASAKA, Masashi RESIGNED | Director | 01 Mar 1996 | 30 Mar 2001 | | September 1949 | 285a Gateshead Road, Borehamwood, Hertfordshire, WD6 5HY |
| TAKEMITSU, Yasuo RESIGNED | Director | 01 Apr 2013 | 23 Mar 2016 | England | October 1962 | Jeol House, Silver Court, Watchmead, Welwyn Garden City, Hertfordshire, AL7 1LT, England |
| USAMI, Toru RESIGNED | Director | 03 Jul 2000 | 01 Apr 2002 | | January 1944 | 38 Dove Park, Chorley Wood, Hertfordshire, WD3 5NY |