| MITSUOKA, Ken ACTIVE | Director | 18 Apr 2024 | | Singapore | August 1972 | Basement, 10 Throgmorton Avenue, London, EC2N 2DL, United Kingdom |
| TAKAYA, Yoshihiro, Dr ACTIVE | Director | 04 Aug 2014 | | United Kingdom | October 1970 | Basement, 10 Throgmorton Avenue, London, EC2N 2DL, United Kingdom |
| GENKO, Junji RESIGNED | Secretary | 08 Dec 2007 | 20 Jan 2016 | | | 75 Walmington Fold, London, N12 7LD |
| KONNO, Masao RESIGNED | Secretary | 31 Oct 1997 | 19 Aug 2002 | | | 1 Zehnder Road, 03-05 Buona Lodge, Singapore, 117686 |
| KONNO, Masao RESIGNED | Secretary | | 18 Jun 1996 | | | 4 The Spinney, Purley, Surrey, CR8 1AB |
| NISHI, Bunji RESIGNED | Secretary | 19 Aug 2002 | 08 Dec 2007 | | | 2677 Kashiwajima, Tamashima, Kurashiki City, Okayama-Pref, Japan |
| TAKAHASHI, Naomi RESIGNED | Secretary | 18 Jun 1996 | 31 Oct 1997 | | | 214 Golders Green Road, London, NW11 9AT |
| ARAI, Tatsuru, Dr RESIGNED | Director | 08 Dec 2007 | 08 Dec 2012 | Japan | July 1941 | 10, Throgmorton Avenue, London, EC2N 2DL, England |
| GENKO, Junji RESIGNED | Director | 10 Dec 2005 | 20 Jan 2016 | United Kingdom | June 1965 | 75 Walmington Fold, London, N12 7LD |
| HATTORI, Teruhiko, Dr RESIGNED | Director | 15 Feb 2011 | 15 Jan 2014 | England | August 1951 | 10, Throgmorton Avenue, London, London, EC2N 2DL, England |
| KODANI, Nobuyuki, Dr RESIGNED | Director | 10 Feb 2016 | 12 Jan 2020 | England | October 1949 | 10 Throgmorton Avenue, London, London, EC2N 2DL, England |
| KOMATSU, Shinichi RESIGNED | Director | 04 Apr 2011 | 12 Jul 2018 | England | February 1952 | 10, Throgmorton Avenue, London, London, EC2N 2DL, England |
| KONNO, Masao RESIGNED | Director | | 31 Aug 2011 | Singapore | February 1948 | 1 Zehnder Road, 03-05 Buona Lodge, Singapore, 117686 |
| MITSUOKA, Ken RESIGNED | Director | 25 Nov 2016 | 31 Aug 2018 | Japan | August 1972 | 10 Throgmorton Avenue, London, London, EC2N 2DL, England |
| NISHI, Bunji RESIGNED | Director | 31 Oct 1997 | 08 Dec 2007 | | February 1950 | 2677 Kashiwajima, Tamashima, Kurashiki City, Okayama-Pref, Japan |
| NISHIE, Hirotada, Dr RESIGNED | Director | 08 Dec 2007 | 15 Feb 2011 | Japan | January 1930 | 1604 Sakamoto Nariwa-Cho,, Takahashi-Shi, Okayama-Ken 719-2343, Japan |
| NUZAKI, Masami RESIGNED | Director | | 20 Apr 1993 | | February 1931 | 2-8-6 Nanpei, Hino-City, Tokyo, FOREIGN, Japan |
| SAKAGUCHI, Masayuki RESIGNED | Director | 15 Jan 2014 | 17 Jul 2014 | England | September 1939 | 10, Throgmorton Avenue, London, London, EC2N 2DL, England |
| SATO, Mitsunori RESIGNED | Director | 15 Feb 2011 | 31 Aug 2011 | England | October 1957 | 10, Throgmorton Avenue, London, London, EC2N 2DL, England |
| SHICHIJO, Hiroyuki RESIGNED | Director | 22 Aug 2014 | 25 Jan 2016 | England | September 1973 | 10 Throgmorton Avenue, London, London, EC2N 2DL, England |
| SUHAPA, Ginnohyoe, Dr RESIGNED | Director | | 20 Apr 1993 | | April 1936 | 250 Bakurocho, Kurashiki City, Okayama Pref, FOREIGN, Japan |
| TAKAHASHI, Naomi RESIGNED | Director | 18 Jun 1996 | 31 Oct 1997 | | July 1961 | 214 Golders Green Road, London, NW11 9AT |
| TAKAMOTO, Hitoshi, Dr RESIGNED | Director | 08 Dec 2012 | 10 Feb 2016 | Japan | February 1948 | 10, Throgmorton Avenue, London, London, EC2N 2DL, England |
| UEDA, Kotaro, Dr RESIGNED | Director | | 18 Jun 1996 | | August 1944 | 18 Montague Road, London, W13 8HA |
| UEDA, Kotaro, Dr RESIGNED | Director | | 20 Apr 1993 | | August 1944 | 18 Montague Road, London, W13 8HA |
| WADA, Seishi, Dr RESIGNED | Director | 12 Jul 2018 | 18 Apr 2024 | Singapore | July 1958 | Basement, 10 Throgmorton Avenue, London, EC2N 2DL |
| YOSHIOKA, Tamotsu RESIGNED | Director | 31 Oct 1997 | 03 Dec 2003 | | January 1938 | 73 Kokufuichiba, Okayama City, Okayama-Pref, Japan |