| Plenary Session | Date | Location | U.S. Chairman | Japan Chairman |
| CULCON I | January 25-31, 1962 | Tokyo | Dr. Hugh Borton, President, Haverford College | Mr. Tatsuo Morito, President, Hiroshima University |
| CULCON II | October 16-22, 1963 | Washington, DC | Dr. Hugh Borton, President, Haverford College | Mr. Tatsuo Morito, President, The Japan Scholarship Foundation |
| CULCON III | March 2-7, 1966 | Tokyo | Dr. Hugh Borton, President, Haverford College | Mr. Tatsuo Morito, Chair, Central Council for Education |
| CULCON IV | April 3-8, 1968 | Washington, DC | Dr. John Hall, Department of History, Yale University | Mr. Tatsuo Morito, President, The Japan Scholarship Foundation |
| CULCON V | March 18-23, 1970 | Tokyo | Mr. Donald Shively, Harvard University | Mr. Tatsuo Morito, President, The Japan Scholarship Foundation |
| CULCON VI | June 21-24, 1972 | Washington, DC and New York | Dr. John Hall, Chairman, Department of History, Yale University | Mr. Yoshinori Maeda , President, NHK (Japan Broadcasting Corp.) |
| CULCON VII | June 17-20, 1974 | Tokyo | Dr. John Hall, Chairman, Department of History, Yale University | Mr. Yoshinori Maeda , Honorary Advisor, NHK (Japan Broadcasting Corp.) |
| CULCON VIII | May 26-28, 1976 | Washington, DC | Dr. John Hall, Chairman, Department of History, Yale University | Mr. Yoshinori Maeda , Honorary Advisor, NHK (Japan Broadcasting Corp.) |
| CULCON IX | July 26-28, 1978 | Tokyo | Dr. John Hall, Chairman, Department of History, Yale University | Mr. Yoshinori Maeda , Adviser to the Ministry of Foreign Affairs |
| CULCON X | May 28-30, 1980 | Washington, DC | Dr. John Hall, Chairman, Department of History, Yale University | Mr. Yoshinori Maeda , Adviser to the Ministry of Foreign Affairs |
| CULCON XI | June 23-25, 1982 | Tokyo | Dr. Robert Ward, Stanford University | Mr. Yoshinori Maeda , Adviser to the Ministry of Foreign Affairs |
| CULCON XII | July 10-11, 1984 | Washington, DC | Dr. Glenn Campbell, Director, Hoover Institution, Stanford University | Mr. Isao Masamune, Advisor to the Board, The Industrial Bank of Japan |
| CULCON XIII | July 29-31, 1986 | Tokyo | (Acting Chairman) Mr.Garret N. Scalera, President, Tokyo Institute of Policy Studies *Dr. Cambell was unable to attend |
Mr. Isao Masamune, Advisor to the Board, The Industrial Bank of Japan |
| CULCON XIV | October 26-28, 1988 | Washington, DC | Dr. Glenn Campbell, Director, Hoover Institution, Stanford University | Mr. Isao Masamune, Advisor to the Board, The Industrial Bank of Japan |
| CULCON XV | March 13-14, 1991 | Tokyo | Dr. John Makin, Director of Fiscal Policy Studies, American Enterprise Institute | Mr. Shoichi Saba, Adviser to the Board, Toshiba Corp. |
| CULCON XVI | April 29-30, 1993 | Washington, DC | Dr. Kenneth Pyle, Professor of History and East Asian Studies, The Henry M. Jackson School of International Studies, University of Washington | Mr. Shoichi Saba, Adviser to the Board, Toshiba Corp. |
| CULCON XVII | January 19-20, 1995 | Tokyo | Dr. Kenneth Pyle, Professor of History and East Asian Studies, The Henry M. Jackson School of International Studies, University of Washington | Mr. Shoichi Saba, Adviser to the Board, Toshiba Corp. |
| CULCON XVIII | May 8-9, 1997 | Washington, DC | Dr. Richard J. Wood, Dean, Yale Divinity School | Mr. Shoichi Saba, Adviser to the Board, Toshiba Corp. |
| CULCON XIX | February 18-19, 1999 | Okinawa, Japan | Dr. Richard J. Wood, Dean, Yale Divinity School | Prof. Nagayo Homma, Chancellor, Seijo Gakuen Schools and University |
| CULCON XX | May 10-11, 2001 | Los Angeles, California | Dr. Richard J. Wood, Dean, Yale Divinity School | Prof. Nagayo Homma, Chancellor, Seijo Gakuen Schools and University |
| CULCON XXI | November 20-21 2003 | Sendai, Japan | (Acting Chairman) Dr. Amy V. Heinrich, Director, C.V. Starr East Asian Library, Columbia University *Dr. Richard Samuels, was unable to attend plenary session |
Dr. Sumiko Iwao, Professor, Musashi Institute of Technology |
| CULCON XXII | July 24-26, 2006 | Big Sky, Montana | Dr. Richard Samuels, Ford International Professor of Political Science, MIT | Dr. Sumiko Iwao, Professor Emeritus, Keio University |
| CULCON XXIII | June 12-13, 2008 | Tokyo | Mr. Thierry Porté, President and CEO, Shinsei Bank, Limited | Mr. Minoru Makihara, Senior Corporate Advisor and Former Chairman Mitsubishi Corporation |
| CULCON XXIV | June 10-11, 2010 | Washington, DC | Mr. Thierry Porté, Operating Partner, J.C. Flowers and Co., LLC | Mr. Minoru Makihara, Senior Corporate Advisor and Former Chairman Mitsubishi Corporation |
| CULCON XXV | April 10, 2012 | Tokyo | Mr. Thierry Porté, Managing Director, J. C. Flowers and Co., LLC | Mr. Minoru Makihara, Senior Corporate Advisor and Former Chairman Mitsubishi Corporation |
| CULCON XXVI | November 18, 2014 | Washington, DC | Mr. Harry Hill President and CEO, Oak Lawn Marketing, Inc. | Mr. Minoru Makihara, Senior Corporate Advisor and Former Chairman Mitsubishi Corporation |
| CULCON XXVII | June 16-17, 2016 | Tokyo | Mr. Harry Hill President and CEO, Oak Lawn Marketing Inc. | Ambassador Ryozo Kato, Former Ambassador to the United States |
| CULCON XXVIII | June 4-5, 2018 | Washington D.C. | Mr. Harry Hill President and CEO, Oak Lawn Marketing Inc. | Ambassador Ryozo Kato, Former Ambassador to the United States |
| CULCON XXIX | October 17/18, 2021 | Hybrid Virtual | Dr. Sheila A. Smith, John E. Merow Senior Fellow for Asia Pacific Studies, Council on Foreign Relations | Ambassador Ryozo Kato, Former Ambassador to the United States |
| CULCON 30 | October 5/6, 2023 | Atlanta | Dr. Sheila A. Smith, John E. Merow Senior Fellow for Asia Pacific Studies, Council on Foreign Relations | Ambassador Sasae Kenichiro, Former Ambassador to the United States |
