Japan Reforms Custody Laws to Keep Parents Connected to Children

In Japan, divorce frequently results in a painful separation between parents and their children. This separation is not merely physical but also legal. For decades, the law favored a system where only one parent retained full rights. However, a significant legal shift is currently underway. On April 1, 2026, Japan implemented a landmark revision to its Civil Code. This change allows divorced couples to share legal custody of their children. Prior to this update, Japan was the only member of the Group of Seven (G7) nations that did not recognize joint custody. This reform marks a pivotal moment in redefining what family means after a relationship ends.

John Deng stands near a local playground on a typical weekday afternoon. He listens as other children play and laugh nearby. His own son and daughter are not there. He longs for the simple moments he once shared with them. He misses taking them to the park or watching them wake up in the morning. He desires to be an active part of their daily lives. Deng, who uses a pseudonym, is originally from Hong Kong. He has lived in Japan for twenty-two years. He built his life there, met his former partner, and became a father. He has an eight-year-old son and a ten-year-old daughter.

However, Deng says his family life has fallen apart. His marriage ended, and his children were taken by his ex-partner without warning. His experience is not unusual in Japan. For a long time, divorce meant one parent lost all presence in the child’s life. Custody was often awarded to the parent who took the children first. Under the old sole custody system, only one parent held legal rights. The other parent could be forced to disappear from the child’s life. The custodial parent held the power to grant or deny access to the other parent.

The legal landscape is now shifting. This change offers hope to parents like Deng who feel cut off from their children. It is one of the most significant changes to Japan’s family law in decades.

"It always shocked me that every time I speak to lawyers in the US and the UK, they say that it's not about win or lose," recalled Seiya Saito, a family lawyer at the Setagaya International Law Office in Tokyo. "It's just focusing on the best interest of children."

Deng remembers the exact moment he realized he had lost contact with his kids. "I felt helpless — sad and also angry about the system that is allowing that to happen," he said quietly. "They mean the world to me." Deng says he has no choice but to cling to any opportunity he gets. He maintains two residences: one in Tokyo and another an hour away, closer to where his children live. Despite this, he is only allowed a few hours of supervised time each month. There is no contact in between these visits.

He notes that his former partner stopped allowing his daughter to communicate with him by phone. This absence is both physical and emotional. He misses birthdays, school recitals, and holidays like Father’s Day. "I just feel so empty," he said, holding back tears. "I think it's the kids' rights to speak to their parents, both parents, anytime they feel they need to or want to and that's not happening at the moment."

According to Japan’s Ministry of Health, Labor, and Welfare, around 38.5% of marriages in Japan ended in divorce in 2024. This figure represents roughly one in three couples. That year, women retained custody in more than 86% of cases. Shared custody arrangements accounted for only a small fraction of all agreements. In total, more than 164,000 children under the age of 18 had divorced parents and were impacted by custody arrangements that year.

The new law recognizes that children often benefit from maintaining relationships with both parents. It aims to help distribute parental responsibility more evenly. "I'm 100% sure it's a good change to our society, especially for the children," Saito said. "For those who are already amicable, and can make decisions together, it's very good for them to have an option to choose joint custody. I think it's a great step forward."

This change arrives as Japan faces a declining birthrate and a rapidly aging population. These demographic trends have intensified calls for the government to support families better. The goal is to reduce the financial burden for single parents. While the new law brings Japan more in line with global peers, it raises serious concerns for some groups.

Critics warn that joint custody could put victims of domestic violence and abuse in greater danger. There is a fear that it might force survivors to continue or renew contact with abusive partners. "There is a risk that those suffering from domestic violence or child abuse may be unable to escape," said Chisato Kitanaka, co-head of the All Japan Women's Shelter Network.

She runs a non-profit organization. She warns parents to fully understand the implications of joint custody arrangements. This is particularly important in cases involving safety concerns. For some families, shared custody raises deep, personal fears. Taro Suzuki, now 18, is no longer under his parents' guardianship. However, he says that watching his mother, Ryo, suffer years of abuse at the hands of his father has left him traumatized. Both their names have been changed for safety.

"I wish I didn't exist in this world. I even wish my mother and father had never met, and I had never been born," Taro said. "I really think this is a law that shouldn't exist."

Ryo describes incidents in which her ex-husband would choke her against a wall, dangling her in mid-air, and drag her along by her hair. She is also worried about the legal changes. "It's really scary. When I got sole custody, I used to think, 'It'll be okay from here on out,' but now there is the possibility that we might be tied together," Ryo said.

She fears the new law may allow her ex-husband to reapply for joint custody of their 15-year-old daughter. This would pull them back into contact. "I really do think it's a problem. I'll have to live with that anxiety until my daughter becomes an adult."

However, there are legal protections in place for cases where there is a risk of abuse. "If the court is convinced that there are domestic violence issues before the separation, before divorce, then the court must choose sole custody," Saito explained.

Still, some survivors like Ryo worry that family courts in Japan will require hard evidence. She is not convinced the courts will get all the cases right. She says that in her experience, there were hardly ever physical signs of abuse because her ex-husband was cautious about leaving marks.

For now, the law sits in the middle of a delicate balance. It attempts to protect vulnerable parents while preserving a child’s relationship with both. The reform seeks to prioritize the child's emotional well-being and right to know both parents. It also aims to create a more equitable system for parents who can co-parent safely.

Back at the neighborhood park, Deng is hopeful the new law may allow him to once again be part of his children’s everyday lives. The shift from a rigid sole custody model to a more flexible shared custody option represents a significant cultural and legal adjustment. It challenges traditional norms in Japanese society, which have historically placed children primarily in the mother’s care upon divorce. The government hopes this change will encourage fathers to remain involved in child-rearing, which could help address broader societal issues like the declining birthrate.

Nevertheless, the implementation of this law will likely be complex. Legal professionals must navigate cases where parental conflict is high or where safety is a concern. Courts will need to carefully evaluate each family’s unique situation. The goal is not to force joint custody on everyone, but to provide it as an available option when it serves the best interests of the child.

"The fact that they're not physically here with me just makes me feel sad," Deng said. "It's something that no parent should face." For families like Deng’s, the new law offers a chance to heal the rupture caused by divorce. For others, like Ryo and Taro, it brings renewed fear and anxiety. The debate over how to best protect children and parents in separated families continues. As Japan moves forward with this reform, it sets a precedent for how modern family structures can be legally supported. The outcome will depend on how effectively the legal system can balance the rights of parents with the safety and well-being of children.

This legislative change is not just about legal definitions. It is about reshaping social expectations. It suggests that family does not end with divorce, but transforms. By allowing joint custody, Japan acknowledges that children benefit from love and support from both parents, provided it is safe to do so. This approach aligns with international standards but must be adapted to fit Japan’s specific social context. The years ahead will reveal how successfully this balance can be maintained.

The revision of Japan’s Civil Code marks a historic shift in family law. It moves the nation away from strict sole custody toward a more inclusive model. While challenges remain, particularly regarding domestic violence and legal enforcement, the potential benefits for children are significant. Parents like John Deng see a future where they can maintain meaningful relationships with their children. Survivors of abuse remain cautious, hoping that protections will be strictly enforced. As Japan navigates this new legal landscape, the focus remains on the best interests of the child. This reform is a crucial step toward a more supportive and equitable family system.