In Japan, land and buildings are recorded in the real estate registry (登記, tōki), maintained by the Legal Affairs Bureau.

The registry records ownership and registered property information. But what is registered and what physically exists on the site do not always match.

On older rural properties, you can sometimes find buildings, extensions, garages, or other structures that were never registered. This is called mitōki (未登記), or “unregistered.”

The building may look perfectly fine when you visit. But an unregistered structure can create complications when you later want to:

• Complete the ownership transfer
• Arrange financing
• Obtain insurance
• Renovate or rebuild
• Sell the property

This is why I never judge a property by the viewing alone. I compare what physically exists on site with the official records, and check for any discrepancies that need to be resolved.

One related note: since April 2024, registering an inheritance has become mandatory in Japan, with penalties for unjustified delay. This is a separate rule, and it does not automatically fix older, unrelated registration gaps — but it is a reminder to always check the registry carefully.

Don’t assume everything you see on a property is reflected in the registry. Check before you buy.

A large plot of land can look like a bonus. But in Japan, what you are allowed to do with land depends heavily on its legal classification and local planning rules.

Many rural properties include agricultural land. Under Japan’s Agricultural Land Act, transferring agricultural land generally requires permission from the local Agricultural Committee (農業委員会). Without the required permission, the transfer is generally invalid.

The committee’s approval is not automatic. Applicants generally need to demonstrate that they can use the agricultural land efficiently and meet the applicable requirements for ongoing agricultural involvement. Because of these requirements, acquiring agricultural land purely as a passive investment can be difficult, particularly for an overseas buyer who does not intend to farm the land themselves.

This matters if your plan is to:

• Renovate a property for personal use
• Operate a holiday home or short-term rental (minpaku)
• Build a guest house or additional structure
• Change the property’s use
• Convert agricultural land to another purpose

Before you buy, don’t just ask “can I buy this property?” Ask “can I legally use it the way I intend?” These are two different questions, and the answer to the second one can change your whole plan.

Build year matters, but it is only the starting point.

In Japan, buildings from May 1981 or earlier were built under the old seismic standard. In June 1981, new seismic standards, known as shin-taishin (新耐震基準), took effect. Buildings from May 1981 or earlier need particular attention when you evaluate an older property.

There is a second important date for wood-frame homes, common in both Niigata and Okinawa: 2000. That year, Japan clarified key requirements for wooden homes, including structural joint connections and balanced wall placement. This is why homes built before 2000 may need extra attention, even if they were already built after the 1981 change.

The difference can matter in real terms. In a detailed post-earthquake survey of 1,995 wooden buildings in central Mashiki, Kumamoto, after the 2016 Kumamoto earthquake, the collapse rate was substantially higher among older buildings.

These figures come from one severe earthquake in one area. They do not predict the safety of any individual house. But they show why build year, structural condition, maintenance history, and a professional inspection all matter together.

An older building is not automatically a bad investment. Many have craftsmanship and character that would be difficult to reproduce today. But you need to know the real structural condition, not just the build year. A property that needs ¥20 million in structural work is a very different investment than one that needs ¥5 million in cosmetic updates.

This is why property evaluation should never start with “how cheap is it?” It should start with “why is it this price?”

Sometimes the answer is a real opportunity. The local market may not yet reflect the property’s potential for the right buyer. The seller may lack the resources to renovate. The property may simply be waiting for the right buyer.

But sometimes the low price reflects a real legal, land-use, or structural problem. Once you buy, that problem becomes yours.

“Cheap and undervalued are different things.”

Knowing the difference matters more than finding the lowest asking price.

For an overseas buyer, this is where local expertise matters most. Depending on the property, proper due diligence may involve:

• A judicial scrivener (shiho shoshi) to review registration matters
• The local Agricultural Committee for agricultural-land questions
• A qualified architect, building inspector, or structural professional for structural assessment
• The local government office for zoning and land-use questions
• Contractors who can give realistic renovation estimates

The exact checks depend on the property. But the principle stays the same: evaluate the whole investment, not just the asking price. The real question is whether the property still makes sense after you understand its legal status, land-use restrictions, structural condition, renovation costs, taxes, and ongoing operating costs.