The Japanese parliament has granted the first major amendment to the Imperial House Law in decades, weakening rules that have kept the line of succession strictly male.

The bill, ratified by the upper house on Friday, allows the imperial family to adopt male relatives older than 15 from dormant branches of the dynasty. It also lets female members retain their royal status when they marry outside the imperial family—a rule that previously forced them to renounce titles.

However, the legal ban against women ascending the throne remains unaltered. The only child of Emperor Naruhito, Princess Aiko, cannot succeed her father under the current structure.

The law has now moved to the final stages of approval, where it will receive the necessary signatures to take effect. Once amended, men from eleven former imperial branches could be brought back into the family, expanding the pool of eligible successors. Yet any daughters who marry commoners will still be excluded from the line of succession.

Japan’s monarchy is the world’s oldest hereditary institution, tracing its roots over 2,600 years. Currently, the senior member in line is 60‑year‑old Fumihito, the emperor’s younger brother, followed by his 19‑year‑old son, Prince Hisahito. The line will collapse if Prince Hisahito has no male descendants, a concern that the new bill seeks to address.

Public sentiment over a potential female emperor is strong, with a June survey by the Mainichi Shimbun showing that more than 70% of respondents support a woman on the throne. A separate poll by Kyodo News found 83% support for the idea.

While the ruling Liberal Democratic Party and other conservative parties argue that male‑only succession is essential for imperial legitimacy, the amendment marks the most significant overhaul of the monarchy’s succession rules in decades. Authorities and broadcast reporters will monitor the final approval steps as the law moves into effect, and PulseWire will provide updates on the evolving situation, encouraging readers to share their thoughts and eyewitness accounts in real time.