Japan revises imperial succession rules, maintains male-only throne

Japan's parliament has enacted a historic revision to the Imperial House Law, introducing changes to address the dwindling size of the imperial family while preserving the male-only succession rule that bars women from ascending the Chrysanthemum Throne.

The bill, passed by the upper house on Friday after clearing the lower house last week, allows the imperial family to adopt distant male relatives over the age of 15 from former branch families that lost their royal status after the Second World War. It also permits female members to retain their imperial status after marrying commoners, a change that addresses a long-standing issue that came to the fore in 2021 when Princess Mako, the emperor's niece, married a commoner and left the family.

However, the revision does not alter the law that restricts succession to men in the paternal line. This means Princess Aiko, the 24-year-old only child of Emperor Naruhito and Empress Masako, remains ineligible to succeed the throne despite widespread public support for a female emperor.

Under the current line of succession, Emperor Naruhito's younger brother, 60-year-old Fumihito (also known as Prince Akishino), is first in line. Next is his son, 19-year-old Prince Hisahito, the only male heir under 60 and the first boy born into the imperial family in four decades. Third in line is the emperor's 90-year-old uncle. Without the new adoption provisions, the line of succession would face the risk of ending if Prince Hisahito did not have a male child.

Coverage comparison

Multiple outlets reported the passage of the bill as a historic change to the world's oldest continuous hereditary monarchy, with lineage believed to span more than 2,600 years. The revision marks the first substantive change to the 1947 Imperial House Law.

Reports from BBC, Deutsche Welle, South China Morning Post, and The Hindu all noted that the revision allows the adoption of distant male relatives and lets women keep their royal status after marriage, but does not alter the male-only succession rule. Fox News and France 24 also covered these provisions, while using more critical language, describing the revision as "enshrining male chauvinism" or "discrimination."

The South China Morning Post reported that the conservative ruling coalition led by Prime Minister Sanae Takaishi has faced criticism from opposition lawmakers for insufficient parliamentary deliberations, with critics accusing the Liberal Democratic Party and its junior coalition partner of pushing to preserve the tradition of male succession.

Key claims

  • The Japanese parliament approved a bill to relax imperial succession rules, allowing the imperial family to adopt distant male relatives over the age of 15. This was reported by BBC, Deutsche Welle, Fox News, France 24, South China Morning Post, and The Hindu.
  • Princess Aiko is not eligible to succeed the throne due to the male-only succession rule, as confirmed by all six outlets.
  • The bill allows women to keep their royal status after marrying outside the family, reported by BBC, South China Morning Post, and others. However, their spouse and children would not be accepted as royals, according to Fox News and The Hindu.
  • Japan's parliament enacted a revision to the Imperial House Law, insisting on paternal-lineage men becoming emperor, reported by France 24, The Hindu, and others.
  • Prime Minister Sanae Takaichi and other conservatives say the male bloodline is the source of the emperor's authority and legitimacy, as quoted by Fox News and The Hindu.
  • There have been eight female monarchs in Japan's history, with the last being Empress Go-Sakuramachi, who ruled from 1762 to 1771, as reported by Deutsche Welle and France 24.
  • The new rules allow princesses to retain their royal status if they marry a commoner, but their spouse and children would not be accepted as royals, reported by Fox News and The Hindu.
  • A survey found that 72% of respondents said they would favor changing the rules to allow women to be emperor, as reported by a single outlet.

Perspectives

Prime Minister Sanae Takaichi and conservative supporters: They argue that the male bloodline is the only source of the emperor's authority and legitimacy, and that the revisions, including adoption of distant male relatives, are necessary to preserve the tradition. This stance was reported by Fox News and The Hindu.

Opposition lawmakers and critics: They have criticized the ruling coalition for insufficient parliamentary deliberations and for preserving the male-only succession rule, according to the South China Morning Post. Experts quoted by France 24 and The Hindu have warned that the new measures could doom the already shrinking imperial family by insisting only men can be emperor.

Public opinion: Multiple outlets noted that opinion polls show widespread public support for allowing women to ascend the throne, with a Yomiuri Shimbun poll suggesting well over half of respondents would welcome Princess Aiko being made eligible to be empress, as reported by Deutsche Welle. A separate survey found 72% favored changing the rules, according to a single outlet.