Japan's parliament has passed amendments to the Imperial Household Law aimed at addressing the country's shrinking imperial family, but the reforms stop short of allowing women to inherit the Chrysanthemum Throne. As a result, Princess Aiko, the only child of Emperor Naruhito, remains ineligible to become Japan's future monarch.

The legislation, approved by the upper house on Friday, introduces measures to expand the number of eligible male heirs by allowing unmarried male descendants from former imperial branches to rejoin the royal family. Their future sons will also be eligible for succession.

The move comes amid growing concerns over the future of Japan's imperial household, which currently has only one young male heir in the line of succession—Prince Hisahito, the 19-year-old nephew of Emperor Naruhito.

Male-Only Succession Rule Remains

Despite the legal changes, the Imperial Household Law continues to restrict succession to males from the paternal line. The rule, first established under the 1889 Imperial House Law and retained in the post-war 1947 legislation, excludes Princess Aiko and all other female members of the imperial family from ascending the throne.

Although Japan has had eight female emperors throughout its history, the current legal framework does not permit women or their descendants to inherit the monarchy.

Royal Women to Retain Status After Marriage

Under the revised law, female members of the imperial family will no longer automatically lose their royal status after marrying commoners. However, the amendment does not extend succession rights to their children, preserving the male-only inheritance system.

The reform is intended to help maintain the size of the imperial household, which has steadily declined over the years.

Public Opinion Favors Female Emperor

Recent public opinion surveys suggest strong support for changing Japan's succession rules. Polls conducted by Japanese media organizations indicate that more than 70% of respondents support allowing a woman to become emperor, while many also favor succession through the maternal line.

However, the ruling Liberal Democratic Party (LDP), led by Prime Minister Sanae Takaichi, has maintained its support for preserving the traditional male-line succession.

Several experts and lawmakers have criticized the amendments, arguing that they fail to reflect public opinion and do not provide a long-term solution to Japan's succession challenges.

Imperial Family Faces Succession Challenge

The Japanese imperial family currently has 16 members, including only five men. Prince Hisahito remains the sole young male heir to the throne, making the question of succession increasingly significant for the future of one of the world's oldest hereditary monarchies.

The latest amendments are expected to keep the debate over female succession alive as Japan continues to balance centuries-old imperial traditions with changing public attitudes.