His Imperial Highness the Crown Prince
- Name
- Lineage
- Eldest Son of His Majesty the Emperor
- Date of Birth
- The Personal Title for Young Members(Been conferred in accordance with the Imperial Family's tradition of appellation)
- Prince Hiro(Hiro-no-Miya)
- Coming of Age Ceremony
- 23 February 1980 (at the age of 20)
- Investiture as Crown Prince
- Honorary Positions
- Honorary Vice-President of the Japanese Red Cross Society
- Education
- 1982 - Graduated from the Department of History in the Faculty of Letters of Gakushuin University
- 1983-1985 - Studied abroad at Merton College, University of Oxford, UK
- 1988 - Completed first part of doctorate at the Graduate School of Humanities of Gakushuin University
- 1992 - Became guest researcher in the archives of Gakushuin University
Her Imperial Highness the Crown Princess
- Name
- Lineage
- Eldest Daughter of Mr. Hisashi Owada
- Date of Birth
- Honorary Positions
- Honorary Vice-President of the Japanese Red Cross Society
- Education
- 1985 - Graduated from the Faculty of Economics of Harvard University, USA
- 1987 - Left Tokyo University
- 1987 - Entered Ministry of Foreign Affairs
- 1988-1990 - Studied abroad at Balliol College, University of Oxford, UK
- 1993 - Left the Ministry of Foreign Affairs
Marriage
- Imperial House Council
- Engagement Ceremony (Nosai no Gi)
- Marriage
Children
- Her Imperial Highness Princess Aiko
- Date of Birth : 1 December 2001
- The Personal Title for Young Members : Princess Toshi(Toshi-no-Miya)
- Third year student at Gakushuin Primary School