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Evidence for Divorce in Japan

There are four types of divorce in Japan, Divorce by Agreement, Divorce by Mediation, Divorce by the decision of the family court, and Divorce by the judgment of a district court. If you wish to divorce in Japan, there are many issues you need to consider, such as your grounds for divorce, monetary matter, child matter, child support, visitation rights, property distribution, monetary compensation, etc.

If the divorce is contested and the conciliatory efforts of the Family Court fail, the second step will require the couple to litigate the divorce in the Family Court. This process will require a Japanese attorney and can be complicated. Additionally, there must be grounds for divorce that satisfy Japanese law.

There are currently five grounds for divorce in Japan, Infidelity, malicious desertion, uncertainty as to whether or not the spouse is dead or alive for three years or more, a serious mental disease without hope of recovery, Grave grounds which make a marriage unable to continue.

The plaintiff needs to prove one of the grounds in the Family Court litigation. To win a divorce lawsuit, the court focuses on obtaining credible evidence to support your claims. Tokyo Private Eye have years of experience and skills gathering information and evidence for Divorce Cases in Japan to help you feel confident in your Divorce Proceedings.


Adultery Investigation

Japan`s divorce rate has been growing and extramarital affairs have become one of the main causes of the problems. When filing for a divorce on grounds of adultery, you will have to provide proof before the court will consider it. You will need documentation that you can use in the trial.  We will find other activities of your spouse that might prove grounds for divorce. We can obtain proof for you that will not only give you peace of mind. But also with a quality report with evidence that is legally court-admissible.


Child Custody

Child custody is a difficult and sensitive issue that comes up during divorce, separation, or custody case. In western countries, joint custody after divorce is allowed. However, in Japan, a married couple has joint custody, but in the case of a divorce, the couple must decide who will get the custody. If you can’t agree on parental authority, the court will decide.

We have carried out a large number of child custody investigation cases nationally and internationally. Our team can help you gather information and evidence to help you win your case.


Child Support

Both parents have the responsibility to support their child(ren) financially.

After a separation or divorce, financial support for the child(ren) will be one of the big problems. If both parties can’t agree on the amount for the child(ren)'s support. You can go to the family court and file a petition for conciliation,  to demand the amount that you need for your child(ren) to the other parent. If you can't agree on the mediation, the trial will start automatically. You will need to prepare proof that the other parent is capable of paying the amount that you are demanding for your child(ren).

If you have problems regarding your child(ren) financial support, we can help you gather the necessary evidence to document and prove your claims.


Financial Background

Financial Background Check is meant to assess a person’s financial responsibility by looking at how they manage money in their day to day life.

No matter the reason ( divorce, alimony, child support, court order, negotiations, business venture, etc. ) why you need to know if someone is concealing assets, we will search their complete financial situation, Assets, Debts, Income Sources, Bank Accounts, Real estate, company shares, etc.

Whatever situation you are facing, our financial investigators are available to provide you with assistance throughout the investigation.





3 Hours of Investigation per day x 3 days:

100,000 ~ ¥ 150,000

8 Hours of Investigation per day x 3 days:

230,000 ~ ¥ 300,000



3 Hours of Investigation per day x 5 days:

150,000 ~ ¥ 250,000

8 Hours of Investigation per day x 5 days:

¥ 250,000 ~ ¥ 500,000



3 Hours of Investigation per day x 7 days:

300,000 ~ ¥ 350,000

8 Hours of Investigation per day x 7 days:

¥ 450,000 ~ ¥ 650,000

The cost of a private investigator depends on the services required. Each case is different and there are different rates depending on the services required. The cost will depend on what you are looking for, the case scenario, the amount of work or time required, and the locations. We can provide a quote on the application once we have discussed and assessed your requirements.

We will always endeavor to work within your budget to get you the results you need. We always ensure clients fully understand what they will be paying before we start the investigation.