How Can You Check If a Rental Home in Japan Is Licensed?

Find out which numbers legal rental homes in Japan should show, where to look for them, and how to confirm a listing with official sources.

Published October 20, 2026 at 10:20 PM JST | By Tokyo Paul

Quick answer: Look for a registration or permit number on the listing and at the property, and note which authority issued it. In Tokyo, the tourism site advises looking for a number starting with "M13" or a permit number combining numbers with kanji or hiragana. You can then confirm it with the local government. If no number appears, ask the host or choose another place.

Why a licensed home matters

A rental home in Japan, often called a minpaku (private lodging), can be legal under one of three official systems: a license under the Hotels and Inns Act, a certification in designated special zones, or a notification under the Private Lodging Business Act. The Japan Tourism Agency describes all three in its overview, and each requires the host to complete a procedure with the authorities.

Checking matters because not every listing follows those procedures. Tokyo's official tourism site warns that many private lodgings operate without the required permits and notifications, and that guests may face sudden cancellations or inadequate fire safety. A licensed home is not a guarantee of a perfect stay, but it does mean the host is inside a regulated framework with safety and sanitation requirements.

For a traveler, the check is simple: find the number, identify the system it belongs to, and confirm it through an official channel when something looks unclear. It takes only a few minutes and is best done before payment, while cancellation is still free or inexpensive.

Where registration numbers appear

Start with the listing itself. Many booking pages have a section for the legal or registration information of the host. It may state a notification number, a permit number or a certification number, along with the name of the city, ward or prefecture that issued it. Take a screenshot so you can compare it later.

Next, look at the property. Hosts operating under the Private Lodging Business Act are generally expected to display a sign showing their status at the home, and licensed businesses often post their license details too. The exact wording and placement of signs differ by system, so the official guidelines and the local office are the right sources for specifics.

Finally, check your confirmation messages. Some hosts send the registration number with the check-in instructions, and a professional manager will usually share it on request. Asking politely before you book is reasonable, and a clear, prompt answer is itself a good sign that the host is organized.

What the numbers look like

Formats depend on the system and the area. Tokyo's tourism site advises travelers to look for a registration number starting with "M13" or a permit number made up of numbers combined with kanji or hiragana (Japanese characters). Those are the two patterns the Tokyo page names, but other cities and prefectures can use different formats, and the page does not describe every case.

That is why a number that does not match the Tokyo pattern is not automatically a problem. A home in Osaka, Kyoto or Hokkaido may show a number issued by its own prefecture or city. What matters is that the listing names the system and the issuing authority so it can be checked.

If a number looks incomplete, contains only a few digits, or does not mention any authority, ask the host for the full details. A host who is operating within the rules should be able to supply them quickly, ideally in writing through the booking platform's messaging system.

How to verify a number step by step

First, write down the number, the host's name and the exact address of the home. Second, work out which system applies: a notification under the Private Lodging Business Act, a Hotels and Inns Act license, or a special zone certification. The Japan Tourism Agency's overview explains each route and its main conditions.

Third, confirm through an official channel. The Japan Tourism Agency runs pages on the private lodging systems, and much of the detail is in Japanese. Local governments, usually the city or ward office or the public health authority, can also confirm whether an address holds a license or notification.

Fourth, use a translation tool or a short message to the local office if needed. Provide the address and number, and ask whether the home is registered. Systems and websites are updated from time to time, so use the official pages for the current procedure.

Who should double-check and special cases

Everyone benefits from a quick check, but some travelers have more at stake. Families with children, groups and older travelers often rely on safety features such as emergency lighting and fire equipment, and these are among the requirements the official systems set. Guests booking long stays or paying large deposits have more to lose if a booking is cancelled.

Travelers who book through a platform should know that the platforms that mediate stays under the Private Lodging Business Act have their own registration process. This guide does not cover how each platform displays information, so read the listing carefully and use the host's messages.

Hotels and traditional inns are usually simpler, because the property is a recognized business with a front desk. Identification requirements may apply at check-in, since operators must keep a guest register, so keep your passport within reach when you arrive at any kind of lodging.

Common mistakes when checking

A common mistake is accepting a number without checking what it refers to. A number copied from another listing, or a business registration unrelated to lodging, does not show that the home is licensed. Another is relying only on reviews, which describe the stay and not the legal status.

Some travelers also stop at a screenshot of a certificate. Documents can be out of date, so confirming with an official source is better. Others forget that rules differ by municipality, and a home that is allowed in one area may be restricted in another.

Finally, avoid agreeing to a private deal outside the booking platform because the host says the listing "is fine." If the host will not provide registration details, a different property is the sensible choice, and plenty of alternatives usually exist.

What to do if there is no number

If a listing has no number, ask the host for it and the name of the issuing authority. If the reply is vague or the host refuses, consider moving on to another property, because plenty of hotels, guesthouses and licensed homes are available in most destinations.

Keep a backup booking option for busy periods such as cherry blossom season and Golden Week. If you are already at a property and have safety concerns, contact the booking platform and consider alternative lodging. This guide shares general information; rules change, so confirm details with the official agency or provider before you act.

Frequently Asked Questions

Does every legal rental home show the same type of number?

No. The type depends on the system. A notification under the Private Lodging Business Act, a Hotels and Inns Act license and a special zone certification are different procedures. Tokyo's tourism site mentions numbers starting with "M13" and permit numbers with kanji or hiragana, but other areas may differ.

Can guests confirm a license with the city office?

Often yes. Local governments, such as the city or ward office or the public health authority, handle licensing and notification in their areas and can usually confirm whether an address is registered. Having the exact address and the number ready makes the inquiry easier, and replies may be in Japanese.

Is a licensed home always safe and problem free?

Not necessarily. A license or notification means the host has completed an official procedure and must meet requirements such as sanitation, safety equipment and a guest register. It does not remove every possible issue, so reading recent reviews and the cancellation terms is still sensible.

Want to go deeper? Tokyo Paul's book Building a Life in Japan is available on Amazon.

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