Japan enshrines in law male-only succession for its shrinking imperial family

By — Mari Yamaguchi, Associated Press Mari Yamaguchi, Associated Press Leave your feedback Share Copy URL https://www.pbs.org/newshour/world/japan-enshrines-in-law-male-only-succession-for-its-shrinking-imperial-family Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Japan enshrines in law male-only succession for its shrinking imperial family World Jul 17, 2026 6:19 PM EDT TOKYO (AP) — Japan's parliament enacted a historic revision to the 19th-century Imperial House Law on Friday by insisting only paternal-lineage men can become emperor, sparking concern that the measure could doom the already shrinking imperial family. The revisions include adoption of distant male relatives to father future heirs and allowing princesses to keep their royal status after marrying commoners. READ MORE: More than 100,000 greet Japan's emperor at enthronement parade Royal watchers and experts fear the new measures could doom the 1,500-year-old hereditary institution by insisting that only males can be emperor. Emperor Naruhito's 24-year-old daughter is hugely popular, and many Japanese want her to be his successor, but Princess Aiko is ineligible because she is a woman. Japan's male-only succession rule means the line must move to the emperor's younger brother, then to his 19-year-old nephew Prince Hisahito. Next in line after him is the emperor's 90-year-old uncle. Japan's Princess Aiko, daughter of Emperor Naruhito and Empress Masako, attends the Spring Imperial Garden Party at the Akasaka Imperial Gardens in Tokyo, Japan, April 17 2026. Photo by Franck Robichon/Pool via Reuterss In an imperial family that places a premium on male royal babies, Hisahito is the first such boy to be born in four decades. Only five of the 16 adults in the imperial family — there are no children — are men. Prime Minister Sanae Takaichi and other conservatives insist the male bloodline is "the only source of the emperor's authority and legitimacy," which is the basis for the upcoming measures. "I'm deeply moved," Takaichi told reporters after the enactment. While an emperor's mother can be a commoner, as is the case with the current one, only boys born to men with royal blood can be heirs to the throne, according to the Imperial House Law. The revision to the antiquated law is meant to solidify the principle of that crucial bloodline by allowing the adoption of distant royal male relatives to father future heirs, pushing the Emperor's daughter to the side. It will also allow princesses to keep their royal status and serve duties if they marry a commoner. "It's a declaration to prevent female monarchs … and to defend the male lineage at all costs," said Hideya Kawanishi, an expert on monarchy at Nagoya University. "They cannot say it's male chauvinism, so they call it tradition." Imperial Household Agency chief Buichiro Kuroda said in a statement that his agency "will do everything it can appropriately to support smooth activity for the Imperial Famil