In recent months, the intersection of personal life and legal reform has drawn attention to Japan’s ongoing debate over marriage equality and surname laws, particularly following public disclosures by former Japanese entertainer Ayaka Wada. Wada, formerly a member of the idol group Ange·lump, announced her marriage to a partner in Taiwan in 2023, a union not legally recognized in Japan due to the country’s current stance on same-sex marriage. Her disclosure has reignited discussions about the need for legal reform regarding both same-sex marriage and the option for married couples to retain separate surnames—a issue locally referred to as “optional separate surnames for married couples.”
Japan remains the only G7 nation that does not legally recognize same-sex marriage, a fact underscored by a series of rulings from various high courts across the country. In March 2024, the Tokyo High Court ruled that while it could not award damages to same-sex couples seeking compensation, the provisions in civil and family law that do not recognize same-sex marriage constitute discriminatory treatment based on sexual orientation and violate Article 14 of the Japanese Constitution, which guarantees equality under the law. The court further noted that such treatment conflicts with Article 24, which governs marriage and family life, though it upheld the current interpretation that Article 24 applies only to opposite-sex unions.
Similar rulings have emerged from other high courts. In March 2025, both the Nagoya and Osaka High Courts issued decisions stating that laws preventing same-sex marriage violate constitutional provisions on equality and marriage freedom. These rulings are part of a broader legal campaign known as the “Freedom to Marry for All” lawsuits, filed by same-sex couples in multiple jurisdictions including Sapporo, Tokyo, Fukuoka, Nagoya, and Osaka. By early 2025, all five high courts overseeing these cases had issued rulings declaring the current legal framework unconstitutional, although none have ordered immediate legalization or compensation.
The Osaka High Court’s decision in March 2025 specifically cited Article 24 of the Constitution, arguing that the exclusion of same-sex couples from marriage benefits—such as inheritance rights and tax advantages—constitutes unjust discrimination. The court emphasized that sexual orientation is not a matter of choice and that denying legal recognition causes real harm to individuals, and families. These rulings align with growing international consensus. as of 2024, over 30 countries worldwide have legalized same-sex marriage, including Taiwan, which became the first in Asia to do so in 2019.
Wada’s marriage in Taiwan highlights a practical reality for many LGBTQ+ individuals in Japan: seeking legal recognition abroad due to domestic limitations. While such marriages are meaningful personally, they do not confer legal status under Japanese law, leaving couples without access to spousal visas, medical decision-making rights, or inheritance protections. This gap has prompted advocacy groups and legal experts to call for urgent legislative action, arguing that judicial rulings alone cannot substitute for comprehensive reform.
Parallel to the same-sex marriage debate is the longstanding discussion about allowing married couples to choose whether to share a surname. Currently, Article 750 of the Japanese Civil Code requires married couples to adopt the same surname, with over 96% of women taking their husband’s name upon marriage, according to government data. Critics argue this requirement disproportionately affects women and undermines gender equality, while supporters maintain it preserves family unity. Multiple court challenges have been filed contesting the constitutionality of the mandatory shared surname rule, though rulings have been mixed, with some courts upholding the law and others suggesting it may require reevaluation.
Legal scholars note that both issues—same-sex marriage and optional separate surnames—are increasingly framed not as niche concerns but as matters of fundamental rights and social inclusion. Former Supreme Court Justice Katsumi Chiba, in a 2025 interview with the Asahi Shimbun, observed that the growing number of unfavorable rulings against the current marriage framework signals a moment for judicial leadership in addressing what he described as a “stalemate” in legislative progress. He emphasized that while courts can highlight constitutional inconsistencies, lasting change ultimately depends on action by the National Diet.
Public opinion surveys conducted in recent years show shifting attitudes. A 2023 NHK poll found that over 60% of Japanese respondents supported legalizing same-sex marriage, with even higher support among younger demographics. Similarly, surveys on surname options indicate growing acceptance of allowing couples to choose, particularly among dual-income households and those advocating for greater gender equity in family law.
Despite this momentum, legislative efforts have stalled. Proposals to amend the Civil Code to permit same-sex marriage or allow optional separate surnames have been introduced multiple times but have not advanced due to internal disagreements within the ruling Liberal Democratic Party and cautious approaches from coalition partners. Lawmakers have often cited the need for further societal consensus, though advocates argue that judicial rulings and polling data demonstrate sufficient public readiness for change.
Looking ahead, the next key developments will depend on whether the Supreme Court agrees to hear appeals from the high court rulings on same-sex marriage. As of mid-2025, no date has been set for such proceedings, and the Court has not indicated whether it will grant review. Legal experts suggest that a decision to hear the case—or a refusal to do so—could significantly influence the timeline for reform. Meanwhile, local governments continue to issue partnership certificates to same-sex couples, offering limited recognition at the municipal level, though these lack national legal standing.
For individuals like Ayaka Wada, whose personal choices have brought visibility to these legal gaps, the hope remains that Japan will align its laws with evolving social values and international human rights standards. Until then, many couples continue to navigate a system that does not fully recognize their relationships, relying on workarounds and advocacy to assert their rights in everyday life.
Readers interested in following updates on marriage equality and family law reform in Japan can consult official releases from the Japanese Ministry of Justice or monitor proceedings of the National Diet. Civil society organizations such as Marriage For All Japan and the Japan Federation of Bar Associations also provide regular updates on legal developments and advocacy efforts.
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