· Updated
By the HalfKey team
Checking a Tokyo minpaku registration number
A registration number is useful when it belongs to the home you are actually booking. Check the address and the date of the official list too, then ask the local office about any mismatch you cannot resolve.
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If a Tokyo listing gives an M-number for a registered minpaku, a home offered for paid short stays, ask for the full number and the property's Japanese address. Then compare them with the relevant authority's published information. The number, address and room need to describe the same accommodation.
This check is worth doing before a payment you cannot easily recover. It is also worth doing carefully: an unsuccessful search doesn't, on its own, prove a property is operating illegally. You may be looking at an older list, the wrong authority or a property using a different licensing route.
First establish which record you need
Ask the host which permission or registration it uses. A minpaku can be registered with the local authority under the Private Lodging Business Act; other accommodation may have a Hotel Business Act licence or use another scheme. A property with a hotel-business licence may be listed separately from registered minpaku.
Shinjuku's official minpaku publication page, for example, links separately to its hotel-business facilities list. That distinction saves you from searching one PDF repeatedly for a property that belongs in another record.
The accommodation's name on a booking platform may also differ from the name in an official record. Start with the Japanese address and the number the host supplies. Ask for the issuing authority if the reference is unclear. A corporate registration number identifies a business; don't substitute it for the accommodation's notification or permission details.
Match the details, not just a number
Find the official website for the ward or other authority responsible for the address. For Shinjuku, use the page linked above and open its current notification list. For properties covered by Tokyo's published information, start with the Tokyo Metropolitan Government's list page. Check which area the list covers and when it was published.
Search using the supplied number, then compare the location. Japanese address formats can look different in English, so use the Japanese version from the host. Include the building and room information where the record provides it. If there are several accommodation units at one address, a matching street address alone may not resolve which unit you have booked.
These labels help with a Japanese list:
| Label | What you are checking |
|---|---|
| 届出番号 | Notification number |
| 所在地 / 施設所在地 | Property location |
| 施設方書 | Building or other address detail, where provided |
| 届出年月日 | Notification date |
| 連絡先 | Contact details |
Shinjuku's page explains which contact appears when the owner manages the accommodation and when another company manages it. A management contact need not be the same name as the friendly profile that answered your booking enquiry. Ask how they are connected if that is unclear.
A missing entry needs a second check
Here is a useful limit of the lookup. Shinjuku says it publishes the previous month's end-of-month information on the tenth, or the following open day when necessary. A notification made early in a month therefore may not appear in the list currently on the website. Compare the claimed notification date with the list's cutoff before drawing a conclusion.
Tokyo's metropolitan list has a different limit: the person who registered the accommodation must agree to have their information published. Tokyo explains this alongside its rules for handling personal information. A property can be registered even if it is missing from this online list.
If you still can't find the property, send the authority the number and address, explain what list you checked, and ask whether it can confirm the record or direct you to the correct office. Ask the host for the details needed to make that enquiry. Wait to pay until you understand why the address or registration details differ.
Don't read extra assurances into the match
A matching record helps confirm that the supplied number belongs to the address you are booking. You'll still need the booking terms for your dates and confirmation that the host can offer the unit.
A photograph of a registration sign is useful context but should match the accommodation you are booking. If the address, room or number changes between the advertisement and payment instructions, ask why and repeat the check for the new details.
Don't try to infer a property's age, management quality or exact location from the digits in its number. Use the record's named fields and the authority's explanation. Our licensing overview explains why the type of accommodation matters separately from its booking channel.
Keep the answer with your booking
Save the listing, the details supplied by the host and any clarification from the authority. Then read the ordinary booking terms: who takes payment, how you receive access, whom you contact after arrival and what happens if the accommodation is unavailable.
If the host supplies a consistent explanation and the official record matches, you can move on to those practical questions. If it cannot explain a different address or permission number, pause the booking and seek clarification before sending more money.