Japan’s Prince Hisahito enters adulthood amid succession debate

Japan’s Prince Hisahito formally entered adulthood on Saturday, September 07, 2025, during an elaborate ceremony at Tokyo’s Imperial Palace where he received a traditional black silk and lacquer crown.

The 19-year-old nephew of Emperor Naruhito becomes second in line to the Chrysanthemum Throne under Japan’s male-only succession rules, sidelining the emperor’s 23-year-old daughter Princess Aiko despite overwhelming public support for female inheritance.

The ceremony reignited debate over Japan’s imperial succession laws, which trace back 2,600 years through legend but face modern challenges.

Traditionalists maintain male succession preserves Japan’s unbroken imperial line, while modernizers propose allowing royal women to retain duties after marriage.

The government panel in 2005 had recommended gender-neutral succession before Hisahito’s birth halted reforms.

Hisahito’s future remains constrained by tradition, including marriage pressures historically causing stress-related illnesses among royal women.

Prince's sister Mako developed complex PTSD before relocating to America following her marriage to a commoner.

Historian Hideya Kawanishi expressed: "Despite public sympathy for reform, ceremonial attention quickly shifts to issues like inflation, leaving political will for change uncertain."