Her Imperial Highness Princess Mikasa
- Name
- Lineage
- Second Daughter of the late Masanari Takagi
- Date of Birth
- Honorary Positions
- Reserve Member of the Imperial House Council
- Honorary Vice-President of the Japanese Red Cross Society
- Education
- 1941 - Graduated from the Gakushuin Women's Academy
Marriage
- Imperial Consent
- Engagement Ceremony (Nosai no Gi)
- Marriage
Children
- First Daughter
- Her Imperial Highness Princess Yasuko
- Date of Birth: 26 April 1944
- Marriage: 18 December 1966 (Mrs. Tadateru Konoe)
- First Son
- His Imperial Highness Prince Tomohito
- Date of Birth: 5 January 1946
- Marriage: 7 November 1980
- Decease: 6 June 2012
- Second Son
- His Imperial Highness Prince Katsura (Yoshihito)
- Date of Birth: 11 February 1948
- Decease: 8 June 2014
- Second Daughter
- Her Imperial Highness Princess Masako
- Date of Birth: 23 October 1951
- Marriage: 14 October 1983 (Mrs. Soshitsu Sen)
- Third Son
- His Imperial Highness Prince Takamado (Norihito)
- Date of Birth: 29 December 1954
- Marriage: 6 December 1984
- Decease: 21 November 2002
Her Imperial Highness Princess Tomohito of Mikasa
- Name
- Lineage
- Third Daughter of the late Takakichi Aso
- Date of Birth
- Honorary Positions
- President of the Tokyo Jikeikai
- Honorary President of the Japan Rose Society
- Honorary President of The Doyo Society of JAPAN
- Honorary President of the Japan Building Maintenance Association
- Honorary President of the Women’s Healthcare Awareness & Menopause Network Society
- Honorary Vice-President of the Japanese Red Cross Society
- International Judo Federation Ambassador
- Education
- 1973 - Graduated from Rosslyn House College, UK
Marriage
- Imperial House Council
- Engagement Ceremony (Nosai no Gi)
- Marriage
Children
- Elder Daughter
- Her Imperial Highness Princess Akiko
- Date of Birth : 20 December 1981
- 2004 - 2010 Studied abroadat at Merton College, the University of Oxford in the UK.
- 2010 - D. Phil. from the University of Oxford in the UK.
- 2018 - Honorary Doctor of Letters from the Kokushikan University.
- President of Shinyusha, General Incorporated Association.
- Honorary Patron of the Japan-British Society.
- President of the Japan-Turkey Society.
- President of the Professional Ski Instructors Association of Japan.
- President of the Middle Eastern Culture Center in Japan.
- President of the Prince Mikasa Foundation
- President of Ichimura Foundation for New Technology
- Honorary Patron of Japan Rugby Football Union
- Honorary President of the Classics Day Prize Committee
- Honorary Chairman of Kokka Seiwakai
- Professor, Institute of Japanese Culture, Kyoto Sangyo University.
- Guest Professor, Kyoto City University of Arts.
- Guest Research Fellow, Archival Research Center, Kyoto City University of Arts.
- Visiting Professor, Ritsumeikan University.
- Special Guest Professor, Kokugakuin University
- Visiting Professor, Kokushikan University Graduate School of Human Sciences.
- Professor, Chiba Institute of Technology
- Principal Staff Scientist, Institute for Geo-Cosmology, Chiba Institute of Technology
- Second Daughter
- Her Imperial Highness Princess Yohko
- Date of Birth : 25 October 1983
- Graduated from the Gakushuin Women's College
- She had worked at the Japanese Red Cross Society since December 2006 to November 2012.
- President of the Social Welfare Organization "Yuaijujikai"
- Honorary President of the Japan Universal Sound Design Association
- Honorary Advisor of the Inclusive Design Network
His Imperial Highness Prince Mikasa
- Name
- Lineage
- Fourth Son of Emperor Taisho
- Date of Birth
- The Personal Title for Young Members(Been conferred in accordance with the Imperial Family's tradition of appellation)
- Prince Sumi(Sumi-no-Miya)
- Coming of Age Ceremony
- 2 December 1935 (at the age of 20)
- Deceased
- Education
- After studying at the Gakushuin Junior High School graduated from the Military Academy and served in the cavalry regiment.
- 1941 - Graduated from the Military Staff College and served as a staff officer
His Imperial Highness Prince Tomohito of Mikasa
- Name
- Lineage
- Eldest Son of Prince Mikasa
- Date of Birth
- Coming of Age Ceremony
- 5 January 1966 (at the age of 20)
- Deceased
- Education
- 1968 - Graduated from the Department of Political Studies in the Faculty of Law of Gakushuin University
- 1968-1970 - Studied at Magdalen College, University of Oxford, UK
- 1970-1972 - Served as a committee member on the organizing committee for the Sapporo Winter Olympics.
- 1975 - Served as a member of the secretariat for the Okinawa International Marine Exhibition and Overseas Marine Youth Meeting.