| May 1992 | WATANBE Michio, Vice Prime Minister, Minister for Foreign Affairs |
| August 1992 | TAKEMURA Masayoshi, Member of the House of Representatives |
| October 1993 | HIRAYAMA Ikuo, President, Tokyo Natoinal University of Fine Arts and Music |
| June 1995 | NISHIGAKI Akira, President, Overseas Economic Cooperation Fund (OECF, now integrated into the Japan Bank for International Cooperation) |
| May 1996 | TAKEMURA Masayoshi, Member of the House of Representatives |
| July 1997 | OBUCHI Keizo, Member of the House of Representatives |
| September 1997 | ASO Taro, Director-General, Economic Planning Agency |
| April 1998 | TOYODA Shoichiro, Chairman, KEIDANREN (Federation of Economic Organizations) |
| August 1999 | TAKEMI Keizo, State Secretary for Foreign Affairs |
| April 2000 | ARIMA Tatsuo, Representative of the Government of Japan |