Neng Nana
In the landscape of modern Japan, a curious and increasingly vocal demographic of citizens is choosing to sidestep the country’s legal marriage system. At the heart of this quiet rebellion is Article 750 of the Japanese Civil Code—a relic of the Meiji era that mandates all married couples share a single surname. While the law has stood for over a century, the modern professional environment, coupled with shifting social norms, has placed it on a collision course with contemporary reality.
As public frustration mounts, a growing number of high-profile individuals—including television announcers, artists, and business leaders—are opting for jijitsukon, or common-law marriage. This arrangement provides a functional partnership without the legal requirement of a name change, but it leaves couples in a precarious state, stripped of the tax, inheritance, and legal protections afforded to formally wedded pairs.
The Meiji-Era Anchor: A Legal Legacy
The requirement for a shared surname, codified in the 1890s, was originally modeled after European legal structures of the time. However, as the rest of the world moved toward individual rights and gender equality, Japan remained an outlier. It is currently the only nation in the world that mandates a singular family name for married spouses.
The statistics highlight a clear gendered disparity: in roughly 95.5% of Japanese marriages, it is the woman who adopts the husband’s surname. For the vast majority, this is a traditional social expectation. For others, however, it is a professional hurdle. Women who have established careers under their maiden names—such as academics, journalists, and entertainers—find that a legal name change can lead to confusion, loss of professional identity, and in some cases, a tangible decline in career opportunities.
Chronology of a Growing Divide
The struggle to modernize Japan’s marriage law has been a decades-long battle, marked by both individual defiance and institutional inertia.
- 1898: The Meiji Civil Code is enacted, formalizing the patriarchal ie (family) system, which includes the requirement for a joint surname.
- 1997: Filmmaker Soda Kazuhiro and producer Kashiwagi Kiyoko marry in New York, deliberately retaining their separate surnames. Upon returning to Japan, their refusal to choose a single name triggers a protracted legal battle that continues to test the bounds of the Japanese judicial system.
- 2015: The Supreme Court of Japan rules that the surname law is constitutional, arguing that while it may cause inconvenience, it does not violate the constitution. The court explicitly defers the power to amend the law to the National Diet.
- 2025–2026: A wave of high-profile announcements, including that of TBS announcer Yamamoto Erika, brings the issue back into the national spotlight. Yamamoto’s decision to opt for a common-law marriage—with the public caveat that she will formally wed only if the law changes—marks a shift from private frustration to public activism.
Case Studies: The Cost of Conformity
The stories of those who have navigated these waters reveal the complexity of the "common-law" workaround.
Manga artist Mizutani Sarucoro provides a harrowing account of the professional damage caused by a name change. After changing her name during her first marriage, she reported a decline in freelance commissions as clients assumed she had transitioned to a housewife role. In a pragmatic, albeit emotionally exhausting, solution for her second marriage, she and her partner wed formally for the sake of their child’s legal standing, then divorced shortly after to return to a common-law arrangement that allowed her to regain her professional name.
This "quasi-legal" status extends to children as well. Social Democratic Party leader Fukushima Mizuho and her partner, lawyer Kaido Yuichi, have lived in a committed common-law relationship for decades. Their daughter, legally categorized as a "non-married" child, represents the collateral damage of a system that refuses to acknowledge the validity of unions that do not fit the traditional mold.
Supporting Data: Public Opinion vs. Political Will
The disconnect between the Japanese public and the government is statistically significant. Recent polling suggests that the mandate for a single surname is losing its mandate among the people.
A January 2025 survey by Kyodo News found that 59.4% of respondents support changing the law to allow for separate surnames. A separate Rengo survey conducted in February 2025 found that while support for the option is robust (46.8%), only 26.6% of the population remains firmly committed to maintaining the status quo.
Interestingly, the data suggests that the demand for separate surnames is not necessarily a call to destroy marriage, but a desire for personal autonomy. The same Rengo survey noted that if the law were amended tomorrow, only 9.5% of current couples would likely take the leap to change their names or revert to separate ones. This suggests that the issue is not about a mass movement away from marriage, but about the right of the individual to choose.
Official Responses and Political Obstruction
Despite the shifting tides of public opinion, the political machinery in Tokyo remains largely unmoved. The current administration, led by Prime Minister Takaichi Sanae, is staunchly conservative on this issue. Takaichi and her allies view the traditional family unit as a pillar of Japanese social stability and have historically blocked efforts to pass legislation that would allow for dual surnames.
Instead of amending the law, the government has proposed a "maiden name recognition" compromise. This would allow women to use their birth names on select legal documents, such as driver’s licenses and bank accounts, without fully decoupling from the husband’s registry. Critics, however, argue this is a superficial "band-aid" solution that does not address the underlying, systemic inequality of the current code.
The Implications: A Future of Uncertainty
The implications of this ongoing stalemate are far-reaching. For the individual, it means living in a state of legal limbo. Common-law couples in Japan lack the automatic protections of formal marriage, including tax benefits, inheritance rights, and the ability to make medical decisions for one another in emergencies.
For the state, the refusal to modernize creates an image of a nation clinging to the 19th century in an increasingly globalized world. When public figures like Yamamoto Erika speak out, they face a dual reaction: the applause of those who see them as vanguards of progress, and the vitriol of those who see them as "disruptors" of Japanese tradition.
As the legal challenges continue to move through the courts and the conversation intensifies in the Diet, one thing remains clear: the definition of "family" in Japan is being rewritten by the people, even if the law remains trapped in the past. For now, couples like Yamamoto and her partner are waiting—not for the institution of marriage to change its meaning, but for the law to finally catch up to the reality of their lives.
The struggle is no longer just about a name; it is about the right to exist in the eyes of the law without having to sacrifice one’s identity at the altar of outdated tradition. Whether the government will eventually heed this call or continue to stand in the way of reform remains one of the most pressing social questions in contemporary Japan.
Laily UPN
Nana Muazin
