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How to Tell If a Vacation Rental Listing Is Legitimate

How to tell if a vacation rental listing is legitimate in Japan starts with one check: the registration or license number on the listing page.12 A missing number can mean a last minute cancellation and a scramble for a replacement bed, so run the check before you pay.34

Confirm current details with official sources

Fees, rules, and requirements can change. Confirm current details at the Japan Tourism Agency minpaku portal and the municipal office covering the listing.

Overview​

This guide is for travelers browsing Airbnb, Booking.com, or Japanese rental platforms at booking-decision stage. It covers the registration-number requirement, where the number appears per platform, how to cross-check it against public registries, red flags for unregistered listings, and the practical consequence of non-compliance.

Anyone conducting private lodging in Japan must use one of three routes: permission under the Inns and Hotels Act, authorization under the National Strategic Special Zones Act, or notification under the Private Lodging Business Act.5 The Private Lodging Business Act route requires prior notification to the prefectural governor, or to the mayor of a city with a health center or a Tokyo special-ward mayor, before accepting any guest.6

Each listing stands on its own filing. One compliant listing does not validate other listings from the same host, and municipal publication and ordinance details differ by prefecture, city, or ward.67 Foreign guests without a Japanese address face one extra check-in step: the host must record passport details and keep a copy.82

A legal Japan listing shows how it is allowed to host. The label differs by legal route, but the presence of a verifiable number is constant across routes.81

Minpaku notification numbers and what the M prefix means​

A notification number under the Private Lodging Business Act starts with the letter M followed by 9 numerical digits.3 Hosts must obtain this number from the local government before starting business, add it to the listing page, and upload an official supporting document proving it.1

Acceptable proof includes a copy of the display permit, a screenshot of the municipal notification email, a screenshot of the administrator system, a screenshot of the acceptance email from the lodging system, or a written notice bearing the number.1 Temporary numbers are not accepted on Airbnb; only the issued M number unlocks publication.3

Using another person's number, or forging or providing false information, carries criminal exposure including suspension or withdrawal, and Airbnb states it may refer such cases to police and administrative authorities without advance warning.1

The standard minpaku cap is a maximum of 180 days per year, counted per registered lodging from noon April 1 to noon April 1 of the next year, with one night counted as one day.69 Local governments may further limit implementation periods or zones through ordinances, so the effective local maximum can sit below 180.65

Hotel-licensed and special-zone numbers that look different​

A listing operating under the Inns and Hotels Act or the National Strategic Special Zones Act enters that license or certification instead of a minpaku M number.110 Required proof for those routes is a copy of the hotel license or permission, or a copy of the special-zone accreditation certificate.10

The three routes differ structurally. Hotel lodging has no annual day cap. Special-zone lodging has no annual cap but requires a 2-night and 3-day minimum stay set by ordinance.5

Private Lodging Business Act lodging stays within 180 days per year.5

Minimum floor space for Private Lodging Business Act lodging is 3.3 square meters per lodger, with no total-size condition beyond that per-person floor.9 Residential-area operation is unavailable for hotel lodging in principle, while the other two routes allow it subject to municipal rules or ordinances.5

Use this table to read the number before you trust it. Figures below reflect portal and platform help text (as of 2026-09; confirm current figures with the Japan Tourism Agency minpaku portal).6310

RouteFormat signalAs ofNotes
Private Lodging Business Act notificationM plus 9 digits2026-093Example Tokyo pattern uses a 130-area prefix; other prefectures differ
Inns and Hotels Act licenseAuthority-specific permit wording, not an M number2026-0910Often called simple lodging for small rentals
Special-zone certificationAuthority-specific certification wording, not an M number2026-0910Year-round operation with a minimum-stay condition

A 民泊 (minpaku, "private lodging in a residence offered for a fee") number is therefore only one valid shape.5 A 簡易宿所 (kan'i shukusho, "simple lodging under the hotel act") permit and a 特区民泊 (tokku minpaku, "special-zone lodging under the strategic-zone act") certificate are equally valid when genuine and matched to the listing.5

An exempt marker alone does not prove legality

An exempt field without a matching hotel-license or special-zone certification still fails the check. Ask the host for the exact route name and the exact number before you pay.310

Where the number appears on major platforms​

Look in the platform registration field, not in photos or marketing copy. The field name differs by platform, but compliant hosts complete it before hosting.12

Airbnb listing pages​

All hosts must show the license or registration number in every Japan listing.2 Guests find the number under Read more about the space on the listing page.2

The host-side entry path runs through Listings, then Regulations or Laws and regulation, then Register your listing and Add notification number with name and email, plus a supporting-document upload.110 Listings without valid registration or other legal details are deactivated so guests cannot book new reservations, and hosts relist through the dashboard once the number is added.3

Airbnb shares host name, listing address, notification number, and nightly booking counts with the Japan Tourism Agency on a daily basis for cap verification (as of 2026-09; confirm current figures with Airbnb and the Japan Tourism Agency).34

Booking.com and Japanese direct-booking sites​

Booking.com requires Japan properties to operate under one of the main licences and to manage compliance through Extranet license fields, covering the Private Lodging Business Act route alongside hotel and special-zone routes.11 Check the registration panel on the property page for the number rather than relying on description prose.

Japan Tourism Agency guidance for lodging agents states that guests should be able to confirm the registration number or property approval and the property address on the agent website, plus pre-use terms.8 Direct-booking operator sites carry the same website-confirmation logic; treat a direct site with no number or address as unverified.8

Copy the number and address before you message the host

Screenshot the registration field and the stated address together. That pair is what you will search in the registry step, and it preserves what was advertised if the listing later changes.17

How to cross-check a number against public registries​

Registries confirm existence, not quality. They answer whether a number was issued and whether the address matches, which is enough to filter out most non-compliant listings.712

National portal lists and what they do not show​

The Japan Tourism Agency minpaku portal is the national entry point for law summaries, FAQs, operator guidance, and links to local-government contacts and the call center.69

The portal publishes aggregated registered-lodging lists by prefecture in PDF or CSV form. Those files show overall registration volume and issued numbers but do not support address-level or facility-name search by general users.12 The absence of national address-level search reflects personal-information protection.12

Treat the national files as background. Do the address match at the municipal file level, where consent-based publication includes location.712

Municipal and ward lists where address matching is possible​

Tokyo publishes notification date, notification number, and lodging address for consenting filers, expressly so guests and neighbors can confirm whether notification exists.7 Publication is consent-based under personal-information law, and the metro page asks that the data not be reused for unrelated sales activity.7

The Tokyo list is refreshed periodically, with the current header stating September 2, 2026 (as of 2026-09-02; confirm current figures with the Tokyo Metropolitan Government).7 Filings made before the Act enforcement date of June 15, 2018 carry that enforcement date as the uniform notification date.7

Run the check in three steps. Copy the M number from the listing and open the ward or prefecture file for the listing area.712

Text-search the number and confirm the registry address matches the listing address.712

A recently issued number may not yet appear in the current monthly file (as of 2026-09).712 In that case ask the operator for the registration date and recheck the next update rather than treating the gap as proof of fraud.

When to contact the local office instead​

The authority that accepts and supervises the filing is the prefectural governor, or the mayor of a city with a health center or a Tokyo special-ward mayor.6 Guests who cannot resolve a number through published lists can contact the supervising local government or public-health office and ask whether a specific notification number exists, rather than requesting personal data about the host.112

A 保健所 (hokensho, "public-health office administering local lodging filings") is therefore the definitive contact when files lag.6 Guests in Japan can also contact the minpaku system call center at 0570-041-389 on weekdays (as of 2026-09).2

Airbnb guest-side help is labeled as general reference information as of March 31, 2021 (as of 2021-03-31 stated on page).2 Confirm current steps with the Japan Tourism Agency portal or the local office before treating older help screenshots as current.

Red flags that point to an unregistered listing​

One flag is enough to pause. Two flags mean set the listing aside until the host answers in writing.13

The legitimacy check below orders the same steps in decision form. Use it after you copy the number.17

Listing-page signals​

The absence of any registration, license, or certification number on a Japan listing is the primary signal, since display is mandatory and missing-info listings face deactivation.32

An exempt marker without a matching hotel-license or special-zone certification path does not satisfy the M-number lookup and needs an explicit license-type explanation.310 Listings that vanish and reappear under new names fit the enforcement pattern in which unnumbered listings are removed and can only return once registered.3

Calendar patterns carry signal: weekend-only availability can reflect a ward weekday ban, while open year-round operation usually points to a hotel license or special-zone permission rather than standard minpaku (as of 2026-06-19; confirm current figures with the listing ward or city office).13 Read the calendar as context, not as proof, and still require the number.

Host-behavior signals​

A host who cannot answer which legal route covers the listing, or who deflects registration questions, fails the basic verification step that compliant hosts complete before hosting.1

Evasive check-in instructions such as avoiding the front desk, using a back entrance, or telling neighbors the guest is a friend or relative contradict the registered-lodging model of posted signage, guest-registry checks, and neighbor-complaint handling.813 Treat that instruction as a walk-away signal.

No passport-copy step for foreign guests without a Japanese address is a warning sign, because hosts must record each such guest nationality and passport number and keep a passport copy.82 Hosts must also record every guest name, address, occupation, and stay dates, and explain noise, waste, and fire-prevention points.82 A host who volunteers none of this before arrival is not following the registered-host script.

A 宿泊者名簿 (shukuhakusha meibo, "lodgers registry book kept by the operator") check at arrival is therefore normal, not intrusive.8 Expect it and cooperate with identification.

Do not book a listing with no number

Unregistered stays risk platform removal and sudden loss of the bed. A cheaper nightly rate does not offset a peak-rate hotel rebooking after a cancellation.34

What happens if your booking turns out to be non-compliant​

The consumer risk is practical, not theoretical. You lose the bed, often with little notice, and you rebook in the same tight market that made the rental attractive.34

Platform cancellation and calendar blocking​

Airbnb deactivates listings without valid legal details so new reservations cannot be made, and delists listings that exceed 180 nights.34

Night counting covers all bookings in notified-residence listings from April 1 onward regardless of booking length or platform, because system integration aggregates across platforms (as of 2026-09; confirm current figures with Airbnb and the Japan Tourism Agency).4 Airbnb may therefore block the calendar even when the Airbnb-only count sits below 180.

The counting year runs April 1 to March 31 of the next year, with one night defined as noon to noon the next day, subject to local ordinance variations.4 A delisted listing is automatically relisted on April 1 of the following year unless further enforcement action applies (as of 2026-09).4

Hosts who overshoot must contact guests, cancel the excess nights, and block the calendar through March 31. Airbnb does not waive cancellation fees or consequences on the host behalf.4

Last minute loss of lodging and how to limit it​

The real consumer risk is sudden loss of lodging through removal, calendar blocking, or host-initiated cancellation to stay under the cap, which forces rebooking at prevailing rates.34

Keeping a backup hotel with free cancellation and saving the registration number plus host messages offline limits that loss (as of 2026-06-19).13 The number is the proof of what was advertised, and the messages show what the host promised about license type and check-in.

Airbnb sends a reminder when the count reaches 150 nights, but calendar management remains the host duty (as of 2026-09).4 Guests cannot see the counter, so do not rely on it as protection.

Good to know​

Weekend-only calendars can reflect a ward ordinance, not a scam​

National law sets the 180-day ceiling while ordinances set the local operating window.65 A thin midweek calendar can therefore signal a weekday restriction in that ward or zone rather than an unregistered listing.

Still require a visible number. Jurisdiction explains the calendar shape; only the number proves the filing.

A ryokan license answer is valid, but ask which license applies​

Airbnb provides a separate license-or-certification entry path with its own proof documents.10 A host answer of hotel or special-zone licensing is valid only with the matching document type, since those routes use permit or certification wording rather than an M number.

Ask for the route name plus the exact number in writing. A vague hotel-license claim without a number is not verification.

Counts run April to April, so late winter availability can go dark​

Late fiscal-year thinning is expected under the April-to-March counting year, because hosts who filled their allocation cannot take new March stays until April 1 (as of 2026-09; confirm current figures with Airbnb and the Japan Tourism Agency).4

Delisted calendars return automatically on April 1, which is why February and March searches can show gaps that are cap-driven rather than demand-driven (as of 2026-09).4 Book peak spring dates early and keep a backup.

Keep the registration number and host messages saved offline​

Saved proof matters because platform data is shared with the Japan Tourism Agency daily and cap disputes are resolved against filing records, not guest memory (as of 2026-09).34

The number, the listing address, and written answers about license type are the items an office or platform would check.71 An offline copy protects rebooking or refund requests when a listing changes or disappears.

See also​

References​

Footnotes​

  1. Airbnb Help Center. "Notification in accordance with the Private Lodging Business Act (Housing Accommodation Business Act) (Minpaku)." https://www.airbnb.com/help/article/2177 ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12 ↩13 ↩14

  2. Airbnb Help Center. "Booking in Japan." https://www.airbnb.com/help/article/2274 (general information as of 2021-03-31 stated on page) ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10

  3. Airbnb Help Center. "How do changes to the Japanese Hotels and Inns Act affect hosting on Airbnb?" https://www.airbnb.com/help/article/2353 ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12 ↩13 ↩14 ↩15 ↩16 ↩17

  4. Airbnb Help Center. "180 night cap in Japan: Frequently asked questions." https://www.airbnb.com/help/article/2667 ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12 ↩13 ↩14

  5. Japan Tourism Agency. "What is Private Lodging?" Portal Website for Private Lodging. https://www.mlit.go.jp/kankocho/minpaku/overview/minpaku/index_en.html ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8

  6. Japan Tourism Agency (JTA), Ministry of Land, Infrastructure, Transport and Tourism. "About Private Lodging Business Act (New Private Lodging Business Act)." Portal Website for Private Lodging. https://www.mlit.go.jp/kankocho/minpaku/overview/minpaku/law1_en.html ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9

  7. Tokyo Metropolitan Government, Bureau of Industrial and Labor Affairs. "Publication of notification information for residential lodging operators (in Japanese)." https://www.sangyo-rodo.metro.tokyo.lg.jp/application/tourism/minpaku/list (list current as of 2026-09-02 per page header) ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12 ↩13

  8. Japan Tourism Agency. "Safety-assured Private Lodging." Portal Website for Private Lodging. https://www.mlit.go.jp/kankocho/minpaku/environment_en.html ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8

  9. Japan Tourism Agency. "FAQs." Portal Website for Private Lodging. https://www.mlit.go.jp/kankocho/minpaku/faq_en.html ↩ ↩2 ↩3

  10. Airbnb Help Center. "How to modify or update your listing information in Japan." https://www.airbnb.com/help/article/3141 ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9

  11. Booking.com for Partners. "Licensing requirements for properties in Japan." https://partner.booking.com/en-us/compliance/accommodation-licensing/licensing-requirements-properties-japan ↩

  12. Stay Buddy Co. "How to Search for Minpaku Registration Numbers." https://note.com/minpaku_hotel_sb/n/n5754f9ed2d90 (published 2025-10-28, auto-translated from Japanese) (limitation: operator blog explaining portal search limits, used only for the no-address-search constraint alongside primary sources) ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8

  13. BluePlanet (Self-Guided Japan). "Japan Minpaku Rules 2026: Is Private Lodging Legal and How to Book Safely." https://selfguidejapan.com/blog/japan-minpaku-rules-2026 (published 2026-06-19) (limitation: travel publisher, used for practical texture on calendar patterns and host-evasion anecdotes, not for statutory rules) ↩ ↩2 ↩3