How to Get Custody in Japan (2026): Joint Custody, Family-court Steps & Parental Rights

Last reviewed: 19 May 2026

Understanding how to get custody in Japan has changed fundamentally since 1 April 2026, when a landmark revision to Japan’s Civil Code took effect and authorised joint parental custody (kyōdō shinken) after divorce for the first time in the country’s modern legal history. Before this date, Japanese family law required courts to designate a single custodial parent upon divorce, a framework that left many non-custodial parents with limited decision-making power over their children’s education, medical care and upbringing. The 2026 revision means that divorcing and already-divorced parents now have a broader set of options, including the possibility that a family court will order shared parental authority where it serves the child’s best interests.

This guide walks through every practical step, from mediation to contested hearings, evidence preparation to cost estimates, so that parents and their advisors can navigate the new landscape with confidence.

What Changed on 1 April 2026, and What It Means for Parents

On 1 April 2026, amendments to Japan’s Civil Code officially entered into force, adding joint custody as a permissible outcome when a married couple divorces. The revision was enacted by the Diet after years of debate driven by international pressure, Hague Convention compliance concerns and domestic advocacy groups representing non-custodial fathers and mothers alike.

Under the previous regime, Article 819 of the Civil Code required that one parent be designated the sole holder of parental authority (shinken) upon divorce. The revised provisions now allow courts, and, critically, the divorcing parties themselves through agreement, to opt for joint parental authority instead. Where the parents cannot agree, the family court may order joint custody if it finds that arrangement to be in the best interests of the child.

The immediate practical effects for parents are significant:

• Divorces filed on or after 1 April 2026. Both parties may agree on joint custody in their divorce agreement. If they cannot agree, the family court can order it.
• Existing sole-custody orders (divorces finalised before 1 April 2026). Either parent may now petition the family court to change an existing sole-custody order to joint custody, provided the petition meets the statutory criteria.
• Pending cases. Divorce and custody matters already before the courts were able to incorporate the new joint-custody option from the date of entry into force.

Industry observers expect that while joint custody Japan 2026 provisions open a new pathway, family courts will still default to sole custody in cases involving domestic violence, parental alienation or an inability to co-parent effectively. The practical reality is that each case will be assessed individually, and parents seeking joint custody must demonstrate cooperative capacity.

Key Legal Terms Explained

Parental Authority vs Physical Custody

In Japanese family law, parental authority (shinken, 親権) is a broader concept than physical custody. It encompasses the legal right and duty to make major decisions about a child’s life, education, medical treatment, religious upbringing and management of the child’s property. Physical custody (kangoken, 監護権) refers specifically to the day-to-day care, residence and supervision of the child. Under the revised Civil Code, a court granting joint parental authority may still designate one parent as the primary residential carer while both parents share decision-making power. Understanding this distinction is essential because how to get custody in Japan now involves two layers of rights that can be allocated separately.

Reading Japanese Terms and Their Practical Meaning

Several Japanese legal terms appear throughout family-court proceedings and official documents:

• Kyōgi rikon (協議離婚), Divorce by mutual agreement, the most common form in Japan, where the parties register their divorce at a municipal office without court involvement. Custody must be agreed upon before registration.
• Chōtei rikon (調停離婚), Divorce through family-court mediation (chōtei). A mediator assists the parties in reaching agreement on all terms including child custody Japan arrangements.
• Saiban rikon (裁判離婚), Judicial divorce, where the family court makes binding rulings after a contested trial.
• Shinken (親権), Parental authority (see above).
• Menkai kōryū (面会交流), Visitation or contact rights, the right of the non-residential parent to maintain a relationship with the child.

Knowing these terms helps parents follow court documents, communicate with Japanese lawyers and understand their procedural rights at each stage.

Who Can Apply and When, Eligibility and Timing

Either parent, Japanese national or foreign, may initiate proceedings related to custody. The revised Civil Code does not restrict eligibility based on nationality, gender or marital status at the time of the petition. Specific scenarios and their procedural implications include:

• Divorcing couples (on or after 1 April 2026). If both parents agree on joint custody, they can record this in the divorce agreement and register it at the municipal office. If they disagree, either parent may petition the family court.
• Already-divorced parents. A parent who was granted sole custody, or who lost custody, before 1 April 2026 may now file a petition to change custody after divorce Japan under the new provisions. The petitioner must demonstrate a material change in circumstances or that joint custody would serve the child’s best interests.
• Unmarried parents. For children born outside marriage, parental authority initially vests in the mother. The father may petition for recognition (ninchi) and subsequently seek joint or sole parental authority Japan through the family court.

Japan recognises several types of divorce. Can you get a divorce without the other person signing? Yes, if mutual agreement (kyōgi rikon) fails, a parent can pursue mediation (chōtei) and, if mediation also fails, a contested judicial divorce (saiban rikon). In all contested paths, the family court will determine custody as part of the proceedings.

How to Get Custody in Japan: Step-by-Step Family-Court Process

The family court custody steps outlined below apply whether you are seeking an initial custody determination during divorce or petitioning to change an existing order. Japan’s family courts require mediation before a contested hearing in most cases, a principle known as chōtei zen’chi shugi (mediation-first rule).

Step 1, Attempt Agreement or Mediation (Chōtei)

Before any contested custody hearing, the family court will almost always require the parties to attempt mediation. In a chōtei rikon custody process, a panel typically comprising one judge and two lay mediators facilitates discussion in private sessions. The goal is a voluntary agreement on custody, visitation, child support and custody Japan arrangements, and property division.

Mediation preparation checklist:

• Draft a proposed parenting plan (residence schedule, decision-making allocation, holiday arrangements).
• Prepare a brief written statement explaining why your proposed custody arrangement serves the child’s best interests.
• Gather evidence of your involvement in the child’s daily life (school pickup records, medical appointment attendance, communication logs).
• Confirm the jurisdiction, file at the family court with jurisdiction over the respondent’s residence, or an agreed-upon court.
• Budget for mediation fees (generally a few thousand yen for the filing stamp) and any lawyer representation costs.

Mediation sessions are typically scheduled every two to four weeks and may take two to six months to conclude. If both parties reach agreement, the mediation outcome is recorded as a binding court order.

Step 2, Filing a Petition for Custody or Change of Custody

If mediation fails, or if you are filing a standalone petition to change an existing custody order, the next step is to file a formal petition (shinpan mōshitate) with the family court. Key procedural points:

• Where to file. The petition is filed at the family court branch that has jurisdiction over the child’s residence or, in divorce matters, over the respondent’s residence.
• What to file. A petition form (available from the family court clerk’s office and, in many courts, downloadable online), together with supporting documents.
• Filing fee. A revenue stamp (typically ¥1,200 per child for a custody petition) and postage stamps for court communications.
• Service. The court will serve the petition on the other parent, who has an opportunity to file a response.

For parents seeking to change custody after divorce Japan, the petition must identify the existing custody order, state the grounds for modification (material change in circumstances or the child’s best interests under the revised provisions) and propose the alternative arrangement sought.

Step 3, Evidence Gathering

The strength of your evidence is often decisive. Japanese family courts assess child custody Japan cases primarily through documentary and investigatory evidence rather than adversarial cross-examination. Careful preparation at this stage can significantly influence the outcome.

Evidence checklist:

Organise all evidence in chronological order with Japanese translations where originals are in another language. Courts will weigh the totality of evidence, so consistency and thoroughness matter more than any single document.

Step 4, Family-Court Investigation, Parental Interviews and Hearings

Once a petition is filed, the family court typically appoints a family-court investigation officer (katei saibansho chōsakan), a trained social-work professional, to investigate the family circumstances. The investigator may:

• Interview each parent separately at the court.
• Interview the child (if old enough to express views, typically from age six or seven, with greater weight given to older children).
• Visit each parent’s home to assess the living environment.
• Contact the child’s school, nursery or paediatrician for additional information.

The investigator submits a written report to the judge, who then schedules a hearing. At the hearing, both parties (usually represented by lawyers) may present arguments. The judge may issue one of several orders: sole custody to one parent, joint parental authority with a designated primary residential parent, or, in rare cases, split arrangements for siblings. Visitation schedules and child-support amounts are typically addressed in the same proceedings. For further context on how family courts work and the appeal process, see our separate guide.

What the Court Will Consider When Deciding Joint Custody

The overriding principle in every child custody Japan determination, before and after the 2026 revision, is the best interests of the child (kodomo no rieki). The revised Civil Code does not prescribe a statutory checklist of factors, but family-court practice and published judicial guidance indicate that courts will weigh the following:

• Child’s age and developmental needs. Younger children are often kept with their primary caregiver; older children’s expressed preferences carry more weight.
• Continuity and stability. Courts prefer arrangements that minimise disruption to the child’s schooling, social networks and daily routine.
• Relationship with each parent. The quality of the parent-child bond, evidenced by day-to-day involvement, is assessed by the court investigator.
• Cooperative capacity. For joint custody specifically, the court will evaluate whether both parents can communicate and make decisions together without exposing the child to conflict.
• Safety and welfare. Any history of domestic violence, abuse, neglect or substance dependency will weigh heavily against joint (or any) custody.
• Living arrangements. Proximity of each parent’s residence to the child’s school, availability of suitable living space and support networks (extended family, childcare).
• Child’s wishes. Where the child is mature enough to form and express a view, the court is expected to give that view due consideration.

Early indications suggest that family courts will approach joint custody orders cautiously, particularly in the first years of implementation. Judges are expected to grant joint parental authority Japan primarily in cases where both parents demonstrate a track record of cooperation and the child’s practical living arrangements will not be significantly destabilised.

How to Protect Parental Rights While the Case Is Pending

Practical Steps for Parents

Custody proceedings can take months. During that period, protecting your parental rights and maintaining your relationship with the child is critical, both for the child’s welfare and for the strength of your eventual case.

• Request interim measures. If there is an immediate risk to the child’s safety or a danger that the other parent will relocate with the child, petition the family court for provisional orders (hozen shobun) establishing temporary custody or prohibiting removal.
• Maintain regular contact. Document every instance of contact, visits, phone calls, video calls, messages. Courts favour the parent who actively fosters the child’s relationship with both parents.
• Keep detailed records. Maintain a diary of parenting involvement, copies of all correspondence with the other parent, and receipts for child-related expenses.
• Do not unilaterally change the status quo. Removing a child from their established home or school without agreement or a court order can be viewed negatively by the court and may constitute a criminal offence in certain circumstances.
• Report safety concerns immediately. If the child is at risk, contact the local child guidance centre (jidō sōdan-sho) or call the police. Japan’s child guidance centres function as the country’s child protection system.

Foreign Parents and Cross-Border Custody Enforcement

For foreign nationals, understanding how to get custody in Japan involves additional considerations related to nationality, consular services and international treaties.

Hague Convention on International Child Abduction. Japan acceded to the Hague Convention in 2014. If a child has been wrongfully removed from or retained outside their country of habitual residence, the left-behind parent may apply through the Japanese Central Authority (Ministry of Foreign Affairs) for the child’s return. However, the Hague Convention addresses return, not custody determinations, custody must still be decided by the court with jurisdiction.

Consular assistance. Embassies and consulates, such as the Australian Embassy in Tokyo, which publishes practical family-law guidance for its nationals, can provide general information and lists of local lawyers, but they cannot intervene in Japanese court proceedings or override custody orders.

Practical steps for foreign parents:

• Ensure your visa status permits you to remain in Japan for the duration of proceedings. Engage an immigration lawyer if your residence status is tied to a spousal visa.
• Register your child’s birth and nationality with your embassy if you have not already done so. See our guide on registration of births and parental status for related considerations.
• Hire a Japanese-qualified family lawyer who has experience with cross-border cases. The Global Law Experts lawyer directory is a practical starting point.
• If the child is a dual national, be aware that Japan does not formally recognise dual nationality after age 22, which may have implications for passport and travel issues.

Costs, Timelines and Likely Outcomes

Understanding realistic timelines and budgets helps parents plan effectively. The table below provides general estimates based on practitioner experience and published court data.

Lawyer fees vary widely depending on the complexity of the case, the lawyer’s experience and the region. Many family lawyers offer an initial consultation (often ¥5,000–¥10,000 for 30 minutes) to assess the case before quoting. Court-appointed investigators incur no additional cost to the parties, their fees are absorbed by the court system.

Changing Custody After Divorce, Petition Procedure

One of the most significant practical effects of the 2026 revision is that parents who divorced under the old sole-custody regime can now petition to change custody after divorce Japan. The procedure follows these steps:

1. Determine grounds. The petitioner must show either a material change in circumstances since the original custody order or that joint custody would now better serve the child’s interests under the revised statutory standard.
2. Attempt mediation first. As with initial custody determinations, the family court will require mediation before proceeding to a contested hearing.
3. File the petition. Submit the petition to the family court with jurisdiction over the child’s residence, attaching the existing divorce certificate, current family register extract and supporting evidence.
4. Court investigation and hearing. The court will appoint an investigator, conduct interviews and issue a ruling.

Grounds that are likely to support a successful petition include: demonstrated improvement in the petitioner’s circumstances (stable housing, employment, proximity to the child’s school), evidence that the current custodial arrangement is no longer serving the child’s welfare, or evidence that both parents now have the capacity to cooperate effectively.

Practical Checklist for Parents

Use the following checklist to prepare before attending any family-court appointment or consulting a lawyer:

• Documents to bring:
  • Family register extract (koseki shōhon), certified copy, no older than three months
  • Certificate of residence (jūminhyō) for yourself and the child
  • Child’s birth certificate
  • Passport and residence card (for foreign parents)
  • Financial records: recent pay slips, tax certificates, bank statements
  • Evidence of parenting involvement (see evidence checklist above)
  • Any existing court orders, mediation records or divorce agreements
• What to say, and what to avoid:
  • Focus on the child’s needs and welfare, not on criticising the other parent.
  • Be specific about your proposed parenting plan, vague requests carry less weight.
  • Avoid making unsubstantiated allegations; courts respond to documented evidence, not emotional appeals.
  • If you have safety concerns, present them with supporting documentation (police reports, medical records, photographs).
• Sample timeline: Initial lawyer consultation → mediation filing (within 2–4 weeks) → first mediation session (4–6 weeks after filing) → mediation conclusion or escalation to adjudication (2–6 months) → contested hearing and ruling (additional 4–12 months if needed).

Parents who approach the process methodically, with organised evidence, a clear parenting plan and realistic expectations, consistently achieve better outcomes than those who rely on informal negotiations alone.

Conclusion

The 1 April 2026 Civil Code revision represents the most significant change to child custody Japan in decades, replacing a rigid sole-custody system with a framework that recognises the potential value of shared parental authority. For parents navigating this new landscape, whether in the midst of divorce proceedings or seeking to modify an existing custody order, the key to success lies in early preparation, organised evidence and a clear, child-centred parenting plan. Understanding how to get custody in Japan now requires familiarity not only with the family-court process but also with the new statutory options that the 2026 changes have made available.

Given the complexity of the process and the stakes involved, parents are strongly encouraged to seek professional legal advice from a qualified family-law practitioner in Japan. A lawyer experienced in Japanese family-court proceedings can help you assess your options, prepare your evidence and represent your interests effectively at every stage.

Sources

1. Courts in Japan, Child-related Processes Handled by Family Courts (brochure)
2. NHK World, Japan introduces joint custody option
3. Asahi Japan (AJW), Joint custody allowed starting April 1, 2026
4. BBC, Divorced couples can now have joint custody
5. Australian Embassy Tokyo, Family law guide
6. Setagaya International Law Office, Joint Custody & parenting arrangements
7. Verybest Law Offices, Getting Child Custody in Japan
8. Yamaue International Law Office, How to obtain parental rights