Emperor Naruhito of Japan Family Tree: The Story Behind The Reiwa Era

Naruhito (徳仁), born 23 February 1960 in Tokyo Imperial Palace, Japan, became the 126th Emperor of Japan on 1 May 2019 when his father Akihito abdicated — the first Japanese imperial abdication in 200 years. He marked the start of the Reiwa era.

The Family's Roots: The Imperial House of Japan

The Imperial House of Japan (Yamato dynasty) is the oldest continuous hereditary monarchy in the world, traditionally dated from Emperor Jimmu in 660 BCE (though the earliest verifiable emperors date from around the 6th century CE).

His Parents

Father: Emperor Akihito (now Emperor Emeritus), born 23 December 1933 — Emperor 1989–2019; abdicated 30 April 2019 (first abdication in 200 years).

Mother: Empress Michiko (now Empress Emerita) Shōda, born 20 October 1934 — Empress 1989–2019; first non-aristocratic commoner to marry into the Imperial family (Shōda family was wealthy industrialist).

His Siblings

Crown Prince Fumihito (Akishino), born 30 November 1965 — younger brother; current Crown Prince of Japan (heir presumptive, as Naruhito has no son). Father of Prince Hisahito (b. 6 September 2006), the future Emperor.

Princess Sayako (Nori), Mrs Kuroda, born 18 April 1969 — younger sister; renounced her imperial title by marrying commoner Yoshiki Kuroda in November 2005 (per the Imperial Household Law, which requires princesses to leave the imperial family upon marriage to commoners).

His Wife: Empress Masako

Masako Owada, born 9 December 1963 — Harvard, Oxford, and University of Tokyo-educated diplomat at the Japanese Ministry of Foreign Affairs before her marriage. Initially declined Naruhito's marriage proposals (in 1988 and 1992); accepted in 1993. Married 9 June 1993 at the Imperial Shinto Hall, Tokyo. Has had periods of mental-health difficulties during her marriage — well-known publicly as a serious adjustment disorder.

Their Daughter

Princess Aiko, born 1 December 2001 — only child; Aiko cannot succeed under current Imperial Household Law (which restricts succession to male-line descendants).

The Imperial Family Tree at a Glance

Family Origins: Yamato dynasty (Imperial House of Japan) — traditionally from 660 BCE; verifiable from ~6th century CE.

Father: Emperor Emeritus Akihito (b. 23 December 1933) — Emperor 1989–2019; abdicated.

Mother: Empress Emerita Michiko Shōda (b. 20 October 1934) — first commoner Empress.

Brother: Crown Prince Fumihito (Akishino) (b. 30 November 1965) — current heir presumptive.

Sister: Princess Sayako (now Mrs Kuroda) (b. 18 April 1969) — left imperial family on marriage 2005.

Wife: Empress Masako Owada (b. 9 December 1963; m. 9 June 1993).

Daughter: Princess Aiko (b. 1 December 2001) — cannot succeed under current law.

Nephew (heir after Fumihito): Prince Hisahito (b. 6 September 2006) — only male of his generation in the Imperial Family.

Emperor Naruhito:

  • Born 23 February 1960, Tokyo
  • Gakushūin School (kindergarten through university); Gakushuin University (BA Modern History 1982; MA Humanities)
  • Merton College, Oxford (1983–85) — studied 18th-century Thames water transport history; the first Japanese imperial heir to study abroad
  • Crown Prince: from 1989 (when his father became Emperor)
  • Worked with UN as Honorary President of the UN Secretary-General's Advisory Board on Water and Sanitation (2007–15) — research on water resources
  • Emperor of Japan: from 1 May 2019 (start of the Reiwa era)
  • His enthronement ceremony was held 22 October 2019

What the Imperial Family Story Teaches Us

A father who abdicated. A mother who was the first commoner Empress. A younger brother (Fumihito) who will be heir-presumptive because Naruhito has no son. A younger sister who left the imperial family by marrying a commoner. A Harvard-Oxford-Tokyo-educated commoner wife who has struggled publicly with the adjustment to imperial life. A daughter who cannot succeed under current law. A nephew who will be the future Emperor.

For every family — large or small, famous or otherwise — the Naruhito story carries the same lesson. Some family successions skip the closest descendant because of law. Princess Aiko cannot succeed her father because Japanese Imperial Law restricts succession to male-line descendants. Write down which family rules shaped which family destinies.

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