Prince Hisahito’s Coming-of-Age and Japan’s Male-Only Succession Dilemma

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On September 6, 2025, Japan marked a significant milestone in its monarchy with the coming-of-age ceremony of Prince Hisahito, the 19-year-old nephew of Emperor Naruhito. This event was not only a ceremonial recognition of Hisahito’s transition into adulthood but also a stark reminder of the mounting challenges facing Japan’s imperial succession system. The world’s oldest monarchy, which has existed for over 2,600 years, is currently at a crossroads, grappling with an issue that could reshape its future: the male-only succession law.

The Coming-of-Age Ceremony: Symbolism and Tradition

Prince Hisahito’s coming-of-age ceremony, known as Kakan-no-Gi, was held at Tokyo’s Imperial Palace with much fanfare. The prince, dressed in a beige robe, was bestowed with a black silk and lacquer crown, marking his official entry into royal adulthood. In his speech, Hisahito acknowledged the weight of the moment, expressing his gratitude and promising to carry out his duties as an adult member of the Imperial Family. His formal ascent into adulthood included a procession where he donned his new black adult attire and traveled by royal carriage to offer prayers at the palace shrines.

This celebration not only honored Hisahito’s growth but also underscored the gravity of the succession crisis that has haunted the imperial family for years. The event’s timing was particularly poignant, as the coming-of-age rituals were delayed by a year to allow the prince to focus on his college entrance exams.

The Male-Only Succession Rule: A Modern Dilemma

Although Prince Hisahito’s coming-of-age is a moment of pride for the royal family, it is also an occasion that casts a shadow over Japan’s monarchy. Despite Emperor Naruhito having a daughter, Princess Aiko, she remains excluded from the succession line due to the male-only inheritance laws in place since the 1889 Meiji Constitution. This rule, which persists under Japan’s postwar 1947 Imperial House Law, has left Japan with a shrinking pool of male heirs. In fact, Prince Hisahito is the only male royal who will likely succeed Emperor Naruhito. After him, there are no male heirs in sight, leaving the monarchy facing an uncertain future.

This situation has sparked intense public debate. While there is strong support among the Japanese population for the idea of allowing women to ascend the throne, the Imperial Family remains bound by traditions that prohibit such a change. Public opinion polls indicate overwhelming backing for female succession, yet the entrenched legal and cultural framework continues to resist reform.

The Implications for Japan’s Imperial Lineage

Prince Hisahito’s coming-of-age is not just a personal milestone but a national issue. His position as second in line to the Chrysanthemum Throne is of immense importance, especially since the succession crisis is increasingly recognized as a matter of national significance. The male-only succession rule has placed Japan’s 2,600-year-old monarchy in a precarious position. Once Hisahito becomes emperor, the royal family will face the dilemma of who succeeds him. With no other male heirs in the direct line, the future of the Imperial Family is at risk.

The lack of male heirs is not just a family issue but a broader societal challenge. Japan’s rapidly aging population and low birth rates exacerbate the problem, further isolating the monarchy from the rest of society. Critics argue that this rigid system undermines the relevance of the monarchy in a modern, progressive society.

A Glimpse into Japan’s Royal Family: The Current State

The Imperial Family, currently made up of 16 adult members, is entering a period of uncertainty. Beyond Prince Hisahito, the only other potential male heirs are his father, Crown Prince Akishino, and his uncle, Prince Hitachi, who is already 89 years old. The aging of the imperial family is a real concern, as it highlights the lack of young male heirs who could continue the royal lineage.

The emperor’s niece, Princess Mako, who married a commoner and relinquished her royal status, and Hisahito’s older sisters, Princess Kako and the late Princess Mako, cannot inherit the throne under the current laws. This limited pool of male heirs has left the monarchy in a state of crisis, with no clear solution to the succession problem. Some have suggested that Japan could revisit its historical allowance for female emperors, but such a change seems highly unlikely in the face of conservative opposition.

Historical Context: A Tradition of Male Emperors

The tradition of male-only succession has deep roots in Japan’s history. Although there have been eight female emperors in Japan’s past, none of them were able to produce a male heir during their reigns. The most recent female emperor, Gosakuramachi, ruled from 1762 to 1770. However, following her reign, the male-only succession rule was formalized in the Meiji Constitution of 1889, and later preserved in the 1947 Imperial House Law.

Prior to these legal changes, women had been allowed to ascend the throne, but due to the absence of male heirs, female emperors were often seen as a temporary solution to succession crises. The modern exclusion of women from succession marks a departure from this historical flexibility, leaving Japan’s monarchy at an impasse.

Looking Forward: Will Japan Reconsider the Succession Laws?

As Prince Hisahito enters adulthood, the discussion surrounding the succession laws is only likely to intensify. Japan’s monarchy is at a crossroads: it must either adapt to the changing demands of society, including the possibility of female succession, or face a future where the Chrysanthemum Throne is left without a male heir.

The global community is watching closely as Japan grapples with this critical issue. The country is known for its preservation of traditions, but as the world evolves, so too must its institutions. Whether Japan will open the door to female succession or hold fast to its longstanding customs remains uncertain. However, the need for reform is becoming increasingly apparent, as the risks of an imperiled monarchy grow clearer with each passing year.

Conclusion: A Critical Moment for Japan’s Royal Family

Prince Hisahito’s coming-of-age is more than a ceremonial event—it is a symbol of the deep challenges facing Japan’s imperial family. As the last male heir to the Chrysanthemum Throne, Hisahito represents the future of an ancient monarchy, but that future remains in jeopardy as the issue of male-only succession continues to dominate the national conversation. The coming years will determine whether Japan’s royal family can adapt to modern realities or if it will be forced to confront a future without a male successor.

Author Profile

Syed Tahir Abbas Shah

Syed Tahir Abbas is a Master's student at Southwest University, Chongqing, specializing in international relations and sustainable development. His research focuses on U.S.-China diplomacy, global geopolitics, and the role of education in shaping international policies. Syed has contributed to academic discussions on political dynamics, economic growth, and sustainable energy, aiming to offer fresh insights into global affairs.

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