| CAMM, Andrew John ACTIVE | Secretary | 21 May 2004 | | | | 4 Habberley Croft, Solihull, West Midlands, B91 3YR |
| CAMM, Andrew John ACTIVE | Director | 03 Jul 2000 | | United Kingdom | June 1964 | Botanica Ditton Park, Riding Court Road, Datchet, Slough, Berkshire, SL3 9LL, England |
| ISHIYAMA, Hiroyuki ACTIVE | Director | 01 Apr 2026 | | Japan | April 1970 | Botanica Ditton Park, Riding Court Road, Datchet, Slough, Berkshire, SL3 9LL, England |
| SANO, Kenichi ACTIVE | Director | 01 Apr 2026 | | Japan | February 1967 | Botanica Ditton Park, Riding Court Road, Datchet, Slough, Berkshire, SL3 9LL, England |
| TAKI, Hiroyuki ACTIVE | Director | 01 Apr 2025 | | England | September 1975 | Botanica Ditton Park, Riding Court Road, Datchet, Slough, Berkshire, SL3 9LL, England |
| OFFICE ORGANIZATION & SERVICES LIMITED RESIGNED | Secretary | | 21 May 2004 | | | Level 1 Exchange House, Primrose Street, London, EC2A 2HS |
| AKAI, Norio RESIGNED | Director | 21 Jun 1993 | 14 Jun 1999 | | November 1940 | 3-27-4 Matsumaedai, Moriya-Cho Kitasouma-Gun Ibaraki, Japan |
| ARAI, Isamu RESIGNED | Director | 21 Jun 1993 | 20 Jun 1997 | | January 1933 | 4-3-14 Umenoki, Itami-Shi Hyougo, Japan |
| ASHIDA, Shingo RESIGNED | Director | 14 Jun 1999 | 16 Jun 2003 | | November 1946 | 2 Stanhope 25 Eastbury Avenue, Northwood, Middlesex, HA6 3LJ |
| BITO, Noriyoshi RESIGNED | Director | 01 Apr 2022 | 01 Apr 2025 | Japan | November 1967 | Botanica Ditton Park, Riding Court Road, Datchet, Slough, Berkshire, SL3 9LL, England |
| BOYD, Stephen James RESIGNED | Director | 03 Jul 1998 | 16 Jun 2011 | United Kingdom | September 1951 | Newton House, Newton House, South Newington, Banbury, Oxfordshire, OX15 4JW |
| EWALD, Karl Heinz RESIGNED | Director | 18 Jun 2004 | 29 Mar 2013 | Germany | January 1954 | 114a Gladbacher Str, Neuss, 41462, Germany |
| FUJIMURA, Keisuke RESIGNED | Director | 01 Jan 2013 | 30 Jun 2014 | England | January 1968 | Whitebrook Park, Lower Cookham Road, Maidenhead, Berkshire, SL6 8YA, England |
| FUSHIKI, Yasushi RESIGNED | Director | 28 Jun 2002 | 17 Jun 2005 | | December 1954 | 25 Ludford Drive, Stirchley Park, Telford, Shropshire, TF3 1RD |
| HASEGAWA, Kosei RESIGNED | Director | 01 Apr 2021 | 01 Apr 2025 | Japan | December 1974 | Botanica Ditton Park, Riding Court Road, Datchet, Slough, Berkshire, SL3 9LL, England |
| HIGASHIYAMA, Norio RESIGNED | Director | 28 Jun 2002 | 16 Jun 2003 | | February 1942 | 2-3-6-703 Hongu, Otsu Shi, Shiga, 520 0084, Japan |
| HIGASHIYAMA, Norio RESIGNED | Director | 03 Jul 1998 | 14 Jun 1999 | | February 1942 | 1007-1, Yamada-Machi, Mitsukaido-Shi, Ibaraki, Japan |
| INOSE, Fumiyuki RESIGNED | Director | 21 Jun 1995 | 03 Jul 1998 | | February 1936 | 2-8-12 Higashitokorzawa, Tokorozawa - Shi, Saitama, 359, Japan |
| ISHIWATA, Masazumi RESIGNED | Director | 01 Apr 2016 | 01 Apr 2024 | Japan | June 1968 | Block E, Sefton Park, Bells Hill, Stoke Poges, Buckinghamshire, SL2 4HD, England |
| ISHIYAMA, Hiroyuki RESIGNED | Director | 01 Jul 2014 | 10 Jun 2019 | England | April 1970 | Whitebrook Park, Lower Cookham Road, Maidenhead, Berkshire, SL6 8YA |
| ITAZU, Hironori RESIGNED | Director | 20 Jun 1997 | 18 Jun 2004 | | February 1942 | 2805 1 2 1 Ooshima, Koutou Ku, Tokyo, 136, Japan |
| KAMEDA, Takashi RESIGNED | Director | 09 Jun 2008 | 16 Jun 2011 | United Kingdom | July 1955 | 137 Penn Place, Solomans Hill, Rickmansworth, Hertfordshire, WD3 1GY |
| KAMEDA, Takashi RESIGNED | Director | 18 Jun 2004 | 19 Jun 2006 | | July 1955 | 3-11-14 Kinunodai Yawara-Mura, Tsukuba-Gun, 300-2436 Ibaraki, Japan |
| KAMEMOTO, Masaru RESIGNED | Director | 01 Apr 2012 | 01 Apr 2016 | Japan | September 1955 | Whitebrook Park, Lower Cookham Road, Maidenhead, Berkshire, SL6 8YA, England |
| KIMOTO, Norifumi RESIGNED | Director | 16 Jun 2011 | 01 Jan 2013 | Great Britain | February 1958 | Whitebrook Park, Lower Cookham Road, Maidenhead, Berkshire, SL6 8YA, England |
| KONO, Yutaka RESIGNED | Director | 01 Nov 2009 | 30 Jun 2014 | England | July 1966 | Whitebrook Park, Lower Cookham Road, Maidenhead, Berkshire, SL6 8YA, England |
| KURODA, Hisaki RESIGNED | Director | 02 Jun 2015 | 31 Mar 2018 | England | February 1965 | Whitebrook Park, Lower Cookham Road, Maidenhead, Berkshire, SL6 8YA |
| KUROKAWA, Kazunao RESIGNED | Director | 01 Oct 1997 | 31 Jan 2000 | | March 1943 | 40a Ingerweg, Meerbusch 40670, Germany, FOREIGN |
| MASUDA, Noritoshi RESIGNED | Director | 01 Apr 2016 | 31 Mar 2026 | Japan | September 1964 | Botanica Ditton Park, Riding Court Road, Datchet, Slough, Berkshire, SL3 9LL, England |
| MASUDA, Noritoshi RESIGNED | Director | 28 Jun 2001 | 28 Jun 2002 | | September 1964 | 103 Majestic Way, Aqueduct, Telford, Shropshire, TF4 3SL |
| MATSUMOTO, Akira RESIGNED | Director | 16 Jun 2003 | 16 Jun 2011 | Japan | January 1948 | 2 -41 -19 Kamiigusa, Suginami - Ku, Tokyo, FOREIGN, Japan |
| MATSUMOTO, Akira RESIGNED | Director | 21 Jan 1994 | 14 Jun 1999 | | January 1948 | Silvanus Uplands Close, Gerrards Cross, Buckinghamshire, SL9 7JH |
| MATSUURA, Masanori RESIGNED | Director | | 21 Jun 1995 | | January 1941 | 10 Sycamore Close Elm Park, Wellington, Telford, Salop, TF1 3NH |
| MATSUURA, Takeshi RESIGNED | Director | 19 Jun 2006 | 06 Jun 2007 | | February 1949 | 3-10 Kubogaoka 3 Chome, Moriya-Shi, Ibaraki-Ken, 302-0104, Japan |
| MATSUURA, Takeshi RESIGNED | Director | 16 Jun 2003 | 18 Jun 2004 | | February 1949 | 36-16 Yokobayashi Enmyoji, Oyamazaki - Cho, Otokuni - Eun 618 -0091, Kyoto, FOREIGN, Japan |
| MITSUI, Junzo RESIGNED | Director | 20 Jun 1997 | 28 Jun 2001 | | December 1947 | Flat 3, Tudor Gables, 5 Frithwood Avenue, Northwood, Middlesex, HA6 3LY |
| MORITA, Masayoshi RESIGNED | Director | | 21 May 1992 | | January 1936 | Admaston Spa Shawbirch Road, Telford, Salop, TF5 0AB |
| MYERS, Joseph Barry RESIGNED | Director | 21 Dec 1999 | 18 Jun 2004 | | May 1944 | 6 Worrow Drive, Bicton Heath, Shrewsbury, Salop, SY3 5DJ |
| NAKAMURA, Takahiko RESIGNED | Director | 17 Jun 2005 | 30 Sep 2008 | | May 1956 | 8 Florance Court, Northwood, Middlesex, HA6 2AE |
| NAKANO, Katsuhiko RESIGNED | Director | | 20 Sep 1993 | | March 1944 | 65a Penshurst Gardens, Edgware, Middlesex, HA8 9TT |
| NUMOTO, Hideaki RESIGNED | Director | 16 Jun 2011 | 01 Apr 2012 | Japan | January 1956 | Whitebrook Park, Lower Cookham Road, Maidenhead, Berkshire, SL6 8YA, England |
| NUMOTO, Hideaki RESIGNED | Director | 14 Jun 1999 | 16 Jun 2003 | | January 1956 | 37 Mayflower Lodge, Regents Park Road, London, N3 3HU |
| OKAFUJI, Masao RESIGNED | Director | 19 Jun 2006 | 16 Jun 2009 | | July 1958 | 6-18 Sakuraidai, Shimamoto-Cho/Mishima-Gun, Osaka 618-0023, FOREIGN, Japan |
| OKUDA, Yutaka RESIGNED | Director | 24 Apr 2018 | 01 Apr 2020 | Japan | September 1958 | Whitebrook Park, Lower Cookham Road, Maidenhead, Berkshire, SL6 8YA |
| OTA, Hiroyuki RESIGNED | Director | 01 Apr 2019 | 31 Mar 2022 | Japan | August 1960 | Block E, Sefton Park, Bells Hill, Stoke Poges, Buckinghamshire, SL2 4HD, England |
| SASAKI, Minoru RESIGNED | Director | | 20 Jun 1997 | | January 1934 | 1-1-30 Makahozumi, Ibaraki, Osaka, Japan |
| SENZAI, Yoshihiro RESIGNED | Director | 14 Jun 1999 | 28 Jun 2002 | | April 1948 | 400 Awabashi Cho, Fushimi Ku, Kyoto Shi, FOREIGN, Japan |
| SUMOTO, Seiji RESIGNED | Director | 01 Apr 2020 | 01 Apr 2021 | Japan | April 1962 | Block E, Sefton Park, Bells Hill, Stoke Poges, Buckinghamshire, SL2 4HD, England |
| SUZUKI, Katsuaki RESIGNED | Director | | 21 Jun 1995 | | November 1931 | 554-2 Kamikashio Cho Totsuka Ku, Yorkohama Shi Kanagawa, Japan |
| SUZUKI, Taku RESIGNED | Director | 17 Jun 2005 | 01 Nov 2009 | | September 1962 | 24 Tudor Gardens, West Acton, London, W3 0DU |
| TAKAHASHI, Masato RESIGNED | Director | 04 Jun 2010 | 01 Apr 2016 | United Kingdom | July 1964 | Whitebrook Park, Lower Cookham Road, Maidenhead, Berkshire, SL6 8YA, England |
| TAKAKI, Tsutomu RESIGNED | Director | 10 Jun 2019 | 01 Oct 2025 | United Kingdom | June 1972 | Botanica Ditton Park, Riding Court Road, Datchet, Slough, Berkshire, SL3 9LL, England |
| TAKAO, Shinichiro RESIGNED | Director | 01 Apr 2024 | 31 Mar 2026 | Japan | July 1968 | Botanica Ditton Park, Riding Court Road, Datchet, Slough, Berkshire, SL3 9LL, England |
| TANIGUCHI, Tomizo RESIGNED | Director | 14 Jun 1999 | 16 Jun 2003 | | March 1947 | 49-8 Shiromisai, Oyamazaki-Cho, Otokuni-Gun, Japan, FOREIGN, Kyoto-Fu |
| TASHIRO, Kazunori RESIGNED | Director | 18 Jun 2004 | 19 Jun 2006 | | February 1951 | 3-6-25 Nakameguro, Meguro-Ku, Tokyo, FOREIGN, Japan |
| TOI, Mitsuharu RESIGNED | Director | 01 Oct 1997 | 21 Dec 1999 | | October 1952 | The Clock House Shawbirch Road, Admaston, Telford, Salop, TF5 0AB |
| YAMAGATA, Hitoshi RESIGNED | Director | 01 Oct 2008 | 31 Mar 2010 | | January 1963 | 8, Florence Court 9 Dene Road, Northwood, Middlesex, HA6 2AE |
| YAMAGUCHI, Hiroshi RESIGNED | Director | 21 May 1992 | 21 Feb 1996 | | August 1938 | The Clock House, Admaston Spa Shawbirch Road, Telford, Shropshire, TF5 0AB |
| YAMAKAWA, Tooru RESIGNED | Director | 16 Jun 2003 | 18 Jun 2004 | | January 1949 | 3-8-5 Matsumaedai, Moriya-City, 302-0102 Ibaraki, Japan |
| YAMAZAKI, Kazuya RESIGNED | Director | 21 May 1992 | 20 Jun 1997 | | March 1947 | Aqueduct, 103 Majestic Way, Telford, Salop, TF4 3SL |
| YOSHIMARU, Shieeki RESIGNED | Director | 16 Jun 2003 | 17 Jun 2005 | | October 1957 | 102 Lynton Road, Acton, London, W3 9HH |