How To Check If A Japanese Property Has Unregistered Inheritance

What "unregistered inheritance" actually means

In Japan, ownership of real estate legally passes to the heirs the moment the owner dies, whether or not anyone updates the registry. Updating the registered owner's name to the heir is a separate step called 相続登記 (souzoku touki, "inheritance registration"), filed at the local Legal Affairs Bureau (法務局, houmukyoku) once the heirs are determined. For decades this filing was not mandatory, so many families — especially for rural land, vacation homes, and akiya with modest value — simply never did it. The registered owner listed in 甲区 (kou-ku, the ownership section of the record) can be someone who died 10, 20, or even 40 years ago.

This is different from a normal sale, where the seller is the person named in the registry. If the registered name and the person negotiating with you are not the same, an inheritance step has to happen before that property can be legally sold to you.

Why this changed in April 2024

Unregistered inheritance became enough of a national problem — untraceable owners blocking redevelopment, infrastructure projects, and disaster rebuilding — that Japan made 相続登記 mandatory starting April 2024. Heirs now generally have three years from when they learn they inherited a property to register it, with a fine for failing to do so. The rule also applies retroactively to inheritances that happened before the law took effect, giving those existing unregistered cases a filing deadline too.

This means the practical problem is shrinking over time, but it has not disappeared. Registering an inheritance still requires identifying every legal heir (which can mean tracking down family members who moved away or lost contact), gathering family register documents (戸籍, koseki), and getting agreement on how the property is divided if there are multiple heirs — none of which happens instantly just because a law changed.

Why this matters more for the property types foreign buyers often target

Unregistered inheritance is not evenly distributed. It is far more common on rural land, older detached houses, and akiya than on condos or newer urban properties, because those are exactly the assets low-value or geographically inconvenient enough that families historically deprioritized the paperwork. If you are searching for a countryside house or an akiya, this is a real and recurring issue, not an edge case.

Here is how to check for this before you get attached to a listing:

1. Order the registration record and read the registered owner's name in 甲区. See How To Order A Japan Property Registration Record In English for the ordering workflow. Compare the registered name to the actual legal seller named in the transaction documents — not to the agent, who is a broker rather than the owner and will almost always have a different name on an ordinary sale.
2. If the registered owner is not the seller, ask directly whether inheritance registration has been completed. Do not assume the agent has already checked this — ask when the registered owner died (if applicable) and whether 相続登記 has been filed for this specific property.
3. Ask who the confirmed heirs are and whether they all agree to sell. If there are multiple heirs, Japanese inheritance law generally requires their agreement (or a formal division agreement, 遺産分割協議, isan bunkatsu kyougi) before the property can be registered and sold. One cooperative heir is not the same as all of them being on board.
4. Treat an old registered-owner name as a timeline question, not necessarily a deal-breaker. Many of these situations do get resolved — heirs are identified, documents gathered, the registration filed — but it takes real time, sometimes months, especially if heirs are numerous or hard to reach.
5. Order a fresh record close to closing. Inheritance registration can be filed at any point in a transaction, so a record you ordered early on may be out of date by the time you are ready to close. Re-check that the registered owner now matches what your closing documents expect.

The most common mistake is not checking the registered owner's name at all and only learning about an inheritance problem when the seller's side raises it late in the process. The second is assuming that because one family member is negotiating with you, the property is theirs to sell — inherited property with multiple heirs is jointly owned until it is formally divided or the estate agrees otherwise.

What the registration record can and cannot tell you here:

• What it shows reliably: the currently registered owner's name in 甲区, and, once filed, an inheritance registration entry showing the transfer from the deceased owner to the heir. If a 相続登記 has already been completed, the current registered name will match the seller.
• What it does not show: who the legal heirs are if the registration has not yet been filed, whether heirs agree on selling, or how far along an in-progress inheritance registration is. Those are questions for the seller's agent or the judicial scrivener (司法書士, shihou shoshi) handling the estate, not something the record itself resolves.
• How to order the record: On Japan Property Research, locate the parcel by address or lot number and order the land registration record for ¥1,500. For a house, order the building record separately, also ¥1,500, since land and buildings are registered independently in Japan.

Because a mismatch between the registered owner and the seller is exactly the kind of thing that is easy to miss on a listing but easy to catch on the actual record, this is a cheap, early check worth doing before you invest more time in a property. Our Japan property due diligence checklist covers where this fits alongside the rest of your research.

FAQ

Can I still buy a property if the registered owner is deceased? Yes, but the inheritance has to be registered first, transferring the record to the heir, before the separate sale transfer to you can be registered. Both filings can be coordinated to close around the same time, but the inheritance step cannot be skipped. This adds a legal step and time to the transaction, not a legal barrier to it.

How long does inheritance registration take? It depends on how many heirs there are, whether they agree, and how easy the required family register documents are to gather. Straightforward single-heir cases can move relatively quickly; cases with multiple heirs or family members who are hard to locate can take significantly longer.

Is unregistered inheritance illegal now? Since April 2024, heirs are generally required to register inherited real estate within three years of learning they inherited it, with penalties for not doing so. The requirement also applies to inheritances that happened before the law changed. This has not erased the existing backlog of unregistered properties, so checking is still worthwhile.

Does this only affect old houses and akiya? It shows up most often there, since rural and low-value properties were historically the ones families deprioritized registering, but it can in principle affect any property where an owner died and the registration was never updated.

Who actually files the inheritance registration? Typically the heirs, usually working with a judicial scrivener (司法書士), who gathers the family register documents, confirms the heirs, and files the registration with the Legal Affairs Bureau.

Related guides:

• What Is Touki In Japan
• How To Check Property Ownership In Japan
• How To Order A Japan Property Registration Record In English
• Akiya Guide For Foreign Buyers In Japan
• Japan Property Due Diligence Checklist