Japan faces royal succession crisis; debate over allowing women to become emperor

Japan's imperial family faces a growing succession crisis, with only three eligible male heirs remaining under the current male-only succession law. To address the dwindling number of royals, the Japanese government has passed a bill in the Lower House, expected to clear the Upper House by July 17, 2026, which aims to revise the Imperial House Law. This proposed legislation would allow female imperial family members to retain their royal status even after marrying commoners, although their children would not gain imperial status or succession rights.

Additionally, the bill permits the adoption of eligible male descendants from former imperial branches that lost their status after World War II. These adopted males, aged 15 or older, would not themselves be eligible for the throne, but their future male descendants could become heirs.

However, a core aspect of the reform is its continued exclusion of women from ascending the Chrysanthemum Throne, despite strong public support for a female emperor. This means that Princess Aiko, Emperor Naruhito's popular only daughter, remains legally barred from the throne, a decision that has drawn criticism amid the pressing need to secure the monarchy's future.