Prince Hisahito of Akishino, born 6 September 2006 in Tokyo, is the youngest current member of the male line of the Japanese Imperial Family. Under the current Imperial Household Law — which limits succession to male descendants of the male line — he is second in line to the Chrysanthemum Throne behind his father.
His Parents
Father: Crown Prince Akishino (Prince Fumihito), born 30 November 1965 — younger brother of Emperor Naruhito; heir presumptive to the throne.
Mother: Crown Princess Kiko of Akishino, née Kawashima Kiko, born 11 September 1966 — first commoner to marry into the modern Imperial Family at the cadet branch level. She is a research scholar.
His Sisters
Mako Komuro (née Princess Mako of Akishino), born 23 October 1991 — Hisahito's eldest sister. She married a commoner, Kei Komuro, on 26 October 2021, and lost her royal status under the Imperial Household Law. The couple now live in New York City.
Princess Kako of Akishino, born 29 December 1994 — Hisahito's elder sister; remains a member of the Imperial Family.
His Family's Position in Imperial Succession
Hisahito is the only male of his generation in the Imperial line. The Imperial Household Law currently excludes Crown Prince Akishino's daughters (and Emperor Naruhito's daughter Princess Aiko) from succession. This makes Hisahito's position the most-discussed Japanese constitutional question of his lifetime.
The Akishino Family Tree at a Glance
Father: Crown Prince Akishino / Prince Fumihito (b. 30 November 1965).
Mother: Crown Princess Kiko née Kawashima (b. 11 September 1966).
Sisters:
- Mako Komuro née Princess Mako (b. 23 October 1991) — left royal household 2021
- Princess Kako of Akishino (b. 29 December 1994)
Prince Hisahito:
- Born 6 September 2006, Imperial Palace, Tokyo
- Tsukuba University Affiliated High School, Tokyo (graduated 2025)
- Studying biology at the University of Tsukuba (from 2025)
- Second in line of succession to the Chrysanthemum Throne (after his father, Crown Prince Akishino)
- Personally interested in dragonflies and entomology — has co-authored peer-reviewed papers on Japanese dragonflies
What the Akishino Family Story Teaches Us
A father who is heir presumptive to the world's oldest continuous monarchy. A mother who was a commoner before marriage. Two sisters, one of whom married a commoner and lost her royal status. A son who is, at 18, the only male heir-in-waiting in his generation in the world's oldest monarchy.
For every family — large or small, famous or otherwise — the Hisahito story carries the same lesson. Sometimes a single child carries the burden of continuation. Whatever rules a family operates under, that child should be written down with as much care as any other. Hisahito is one person among nearly 130 million Japanese, and he stands as the single thread of male-line dynastic continuation. Write down the equivalents in your own family. The single threads matter most.
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