| BODSWORTH, Charles Alexander ACTIVE | Secretary | 22 May 2025 | | | | 24, Bedford Row, London, WC1R 4TQ, England |
| HOSOYA, Yuichi, Professor ACTIVE | Director | 08 Apr 2013 | | Japan | August 1971 | 24, Bedford Row, London, WC1R 4TQ, England |
| HUNTER, Janet Elizabeth, Professor ACTIVE | Director | 30 Sep 2014 | | United Kingdom | July 1948 | 24, Bedford Row, London, WC1R 4TQ, England |
| KADONO, Izumi, Professor ACTIVE | Director | 12 Sep 2019 | | Japan | April 1947 | Sasakawa Peace Foundation Bldg.,, The Great Britain Sasakawa Foundation, 1-5-16 Toranomon,, Tokyo 105-0001, Japan |
| MADDEN, Paul Damian ACTIVE | Director | 22 May 2025 | | England | April 1959 | Wychwoood, Pembroke Road, Woking, GU22 7DS, England |
| PITMAN, Joanna Beaufort ACTIVE | Director | 11 Nov 2010 | | England | September 1963 | 24, Bedford Row, London, WC1R 4TQ, England |
| ROBINSON, Ann Louise, Professor Dame ACTIVE | Director | 25 Aug 2025 | | United Kingdom | October 1961 | 24, Bedford Row, London, WC1R 4TQ, England |
| SASAKAWA, Jumpei ACTIVE | Director | 04 Oct 2023 | | Japan | February 1975 | 24, Bedford Row, London, WC1R 4TQ, England |
| SCOTT, Jeremy Lloyd ACTIVE | Director | 18 Sep 2018 | | England | January 1955 | 24, Bedford Row, London, WC1R 4TQ, England |
| TANAMI, Tatsuya ACTIVE | Director | 01 Apr 2008 | | Japan | February 1950 | 24, Bedford Row, London, WC1R 4TQ, England |
| TSURUOKA, Koji ACTIVE | Director | 11 Nov 2025 | | Japan | August 1952 | 4-12-16, Hongo, Bunkyo-Ku, Tokyo 113-0033, Japan |
| BARRETT, Michael Paul RESIGNED | Secretary | 01 Jul 2000 | 01 Jun 2006 | | | 25 Offerton Road, London, SW4 0DJ |
| GRIGGS, Brendan RESIGNED | Secretary | 31 May 2016 | 30 Nov 2020 | | | 24, Bedford Row, London, WC1R 4TQ, England |
| HAND, Peter Dermot RESIGNED | Secretary | 20 Jun 1997 | 01 Jul 2000 | | | 8 Dellfield Close, Radlett, Hertfordshire, WD7 8LS |
| MCENALLY, Stephen John RESIGNED | Secretary | 01 Jun 2006 | 31 May 2016 | | | Dilke House, 1 Malet Street, London, WC1E 7JN |
| MORGENSTERN, Philip Louis RESIGNED | Secretary | | 20 Jun 1997 | | | 110 Cannon Street, London, EC4N 6AR |
| WHITE, Jenny Louise RESIGNED | Secretary | 01 Nov 2020 | 22 May 2025 | | | 24, Bedford Row, London, WC1R 4TQ, United Kingdom |
| BARRETT, Michael Paul RESIGNED | Director | 01 Jul 2000 | 01 Jul 2000 | England | July 1941 | 25 Offerton Road, London, SW4 0DJ |
| BOYD, John Dixon Ikle, Sir RESIGNED | Director | 15 Feb 2001 | 18 Oct 2019 | United Kingdom | January 1936 | Dilke House, 1 Malet Street, London, WC1E 7JN |
| BRIGSTOCKE, Heather Renwick, Baroness RESIGNED | Director | 19 May 1994 | 30 Apr 2004 | | September 1929 | Flat 6, 6 Redcliffe Square, London, SW10 9JZ |
| BROWN, Jeremy John Galbraith RESIGNED | Director | 19 May 1994 | 30 Sep 2014 | United Kingdom | August 1933 | Dilke House, 1 Malet Street, London, WC1E 7JN |
| BUTTERFIELD OF STETCHFORD, William John Hughes, Lord RESIGNED | Director | | 20 Jun 1997 | | March 1920 | 39 Clarendon Street, Cambridge, Cambs, CB1 1JX |
| CHIBA, Kazuo RESIGNED | Director | 01 Jan 1993 | 14 Sep 2004 | | April 1925 | Mitsui & Co Ltd, 2-1 Ohtemachi 1-Chome, Chiyoda-Ku Tokyo 100, Japan |
| COPE, David Robert, Professor RESIGNED | Director | 24 May 2006 | 23 May 2025 | United Kingdom | July 1946 | 24, Bedford Row, London, WC1R 4TQ, England |
| CORSAN, Sidney John David RESIGNED | Director | | 17 May 1996 | | October 1925 | 20 Farmer Street, London, W8 7SN |
| DU CANN, Edward Dillon Lott, The Rt Hon Sir RESIGNED | Director | | 12 Sep 1993 | | May 1924 | 11 Barton Street, London, SW1P 3NE |
| EARL OF ST ANDREWS, George Philip Nicholas, Earl RESIGNED | Director | 30 May 1995 | 23 May 2025 | United Kingdom | June 1962 | 24, Bedford Row, London, WC1R 4TQ, England |
| FRENCH, Michael Levick RESIGNED | Director | 17 May 1996 | 18 Sep 2018 | England | December 1947 | Dilke House, 1 Malet Street, London, WC1E 7JN |
| FUJII, Hiroaki RESIGNED | Director | 17 May 2005 | 11 Nov 2025 | Japan | August 1933 | 24, Bedford Row, London, WC1R 4TQ, England |
| GOUGH, Charles Brandon, Sir RESIGNED | Director | | 17 May 1996 | England | October 1937 | The New Cottage, Long Barn Road, Weald Sevenoaks, TN14 6NH |
| HAYASHI, Nozomu, Professor RESIGNED | Director | 07 Feb 2006 | 01 Nov 2014 | Japan | February 1949 | Dilke House, 1 Malet Street, London, WC1E 7JN |
| IRIYAMA, Akira RESIGNED | Director | | 27 Jul 2005 | | January 1939 | Sasakawa Peace Foundation, Sasakawa Hall 3-12-12 Mita Minato-Ku Tokyo, FOREIGN, Japan |
| KAWAGUCHI, Yoriko, Professor RESIGNED | Director | 21 Oct 2013 | 11 Nov 2025 | Japan | January 1941 | 24, Bedford Row, London, WC1R 4TQ, England |
| KIMURA, Harumi RESIGNED | Director | | 23 Jun 2011 | | November 1932 | 2-45-5 Kotake-Cho, Nerima-Ku, Tokyo, 176-0004, FOREIGN, Japan |
| MADDEN CMG, Paul Damian RESIGNED | Director | 25 Oct 2024 | 05 Sep 2025 | England | April 1959 | 24, Bedford Row, London, WC1R 4TQ, England |
| MATHIAS, Peter, Professor RESIGNED | Director | 19 May 1994 | 23 Jun 2011 | | January 1928 | 33 Church Street, Chesterton, Cambridge, CB4 1DT |
| MAXWELL, Ian Robert RESIGNED | Director | | 06 Jul 1992 | | June 1923 | Headington Hill Hall, Oxford |
| MAXWELL, Ian Robert Charles RESIGNED | Director | | 06 Jul 1992 | | June 1956 | Headington Hill Hall, Oxford, OX3 0BB |
| MOMOI, Makoto, Professor RESIGNED | Director | | 20 Jun 1997 | | February 1923 | 438 2-21-11, Higashi Gotanda Shinagawa-Ku Tokyo, FOREIGN, Japan |
| NISHIMURA, Mutsuyoshi, Ambassador RESIGNED | Director | 21 Oct 2013 | 01 Nov 2016 | Japan | August 1940 | Dilke House, 1 Malet Street, London, WC1E 7JN |
| OGILVY, Angus James Bruce, The Rt Hon Sir RESIGNED | Director | | 01 Jan 1995 | | September 1928 | Thatched House Lodge, Richmond Park, Surrey, TW10 5HP |
| OWEN, David Anthony Llewellyn, Lord RESIGNED | Director | | 06 Apr 1993 | United Kingdom | July 1938 | 78 Narrow Street, London, E14 8BP |
| PARK, Daphne Margaret Sybil Desiree, Baroness RESIGNED | Director | 16 Nov 1994 | 15 Feb 2001 | | September 1921 | 6 Belsyre Court Observatory Street, Oxford, Oxfordshire, OX2 6HD |
| RAWSON, Jessica Mary, Professor RESIGNED | Director | 14 Oct 2004 | 02 Nov 2005 | England | January 1943 | 19 Merton Street, Oxford, OX1 4JE |
| RONSON, Gerald Maurice RESIGNED | Director | | 06 Jul 1992 | United Kingdom | May 1939 | Carrington Chase, 54 Winnington Road, London, N2 0TY |
| SAKURAUCHI, Yoshio RESIGNED | Director | | 20 Jun 1997 | | May 1912 | House Of Representatives, Tokyo, FOREIGN, Japan |
| SASAKAWA, Yohei RESIGNED | Director | | 11 Sep 2012 | | January 1939 | The Nippon Foundation, 6-9-25 Matsubara Setagaya-Ku, Tokyo, 177-0053, FOREIGN, Japan |
| TANAKA, Itaru RESIGNED | Director | | 21 Sep 1993 | | February 1927 | 1003 1-3-16 Meguro, Meguro-Ku Tokyo, FOREIGN, Japan |
| TANIGUCHI, Tomohiko, Professor RESIGNED | Director | 11 Sep 2012 | 14 Feb 2013 | Japan | June 1957 | Dilke House, 1 Malet Street, London, WC1E 7JN |
| TESHIMA, Ryuichi RESIGNED | Director | 01 Jun 2015 | 31 Mar 2023 | Japan | July 1949 | 24, Bedford Row, London, WC1R 4TQ, England |
| WATANABE, Shoichi, Professor RESIGNED | Director | | 29 Oct 2013 | | October 1930 | Dilke House, 1 Malet Street, London, WC1E 7JN |
| WHITEHEAD, John Stainton, Sir RESIGNED | Director | 01 Jan 1993 | 17 May 1996 | | September 1932 | Bracken Edge, High Pitfold, Hindhead, Surrey, GU26 6BN |