Who owns what in a marriage in Japan?

Each spouse keeps their own property; a court may divide it on divorce

In Japan each spouse owns what is in their name, and on divorce one can ask for a division of the property acquired during the marriage, generally in equal shares.

Updated October 2026. Spotted a mistake? Tell us.

The default, not your case. This page describes what applies when a couple sign no contract. Family law changes, and a court can decide differently on the facts of a case. For a couple with a foreign spouse, take advice in each country involved. This is general information, not legal advice.

What applies by default

Property in one spouse's name is theirs, and property of unclear ownership is presumed to be shared. There is no automatic joint ownership.

When the marriage ends in divorce

A spouse may request a division of the property built up during the marriage, and courts usually apply equal shares as a starting point.

A marriage contract

A marriage property contract must be registered before the marriage to bind third parties, and it is rarely used.

What stays your own, and gifts

Property from before the marriage and inheritances are generally outside the division.

If one spouse is a foreigner

Japan has its own rules on which country's law applies to the marital property of foreigners.

Understand the legal system first

Japan belongs to the Civil law family. Family law grows out of the legal tradition, so it helps to know how the system works.

Read the Japan legal-system profile in the Legal Families Atlas →
Can a foreigner buy property in Japan? →

Official sources

Ministry of Justice of Japan

TheLawToKnow Tools’s marital property guide is an educational overview of general rules. It is not legal advice, and it does not replace the official source or a lawyer in the country. Report a mistake.