What Japan’s one-month accommodation guidance says

You may hear that a Tokyo apartment becomes a residential rental once the booking reaches 30 days. The official guidance is more careful than that. It suggests using one month as a guide when assessing the booking, alongside how the business actually runs the property. Reaching that length does not automatically remove the need for a lodging licence.

The document behind many of these explanations is a joint notice issued on 6 November 2018 by the Japan Tourism Agency and the Ministry of Health, Labour and Welfare. It addresses information on websites that help travellers book accommodation and when an offering falls within the Hotel Business Act. Reading its conditions together is more useful than lifting out the month reference alone.

The starting point is the actual operation

The notice refers to the existing approach to distinguishing lodging from other arrangements. MHLW's Hotel Business Act FAQ explains the relevant considerations: who is responsible for keeping the property clean and hygienic, and whether the person lives in the room as their home. The assessment considers how the property is managed as a whole.

These are questions about what happens in practice. The word “lease” on a website is not enough to answer them. A kitchen, a washing machine or a bill bundled into the rent does not by itself show whether the home is lodging or a residential rental.

For a traveller, this means you should ask what agreement you will sign and who manages the accommodation, then read the explanation as a whole. For an owner or business planning an operation, take the actual plans to the relevant public health centre rather than designing around a number of nights.

What the one-month reference does

The 2018 notice recommends that accommodation websites use one month when deciding whether to treat a booking as lodging or assess it as a rental. If a local authority already uses a different length of stay for that check, the notice lets it continue. That qualification matters: the document itself does not announce a uniform national “30-night rule.”

The notice generally treats stays shorter than that period as lodging. For bookings intended to last at least that long, it sets out further conditions for the website to treat the listing as a rental. The length is one question; the contract and how the home is managed are others.

Use “one month” when describing the notice. The difference isn't cosmetic. Calendar-month booking policies can produce different numbers of nights depending on the dates. A company advertising a 30-day minimum may have chosen its own commercial period; ask how it calculates your booking rather than assuming the notice supplies that calculation. For example, 1 February to 1 March 2026 is 28 nights, while 1 March to 1 April is 31 nights. Those are calendar calculations, not tests that decide whether a property needs a lodging licence.

The listing must explain the rental arrangement

For the longer bookings addressed in the notice, the website should clearly show the minimum stay. It should explain that you must sign a short-term lease and that the business does not take responsibility for keeping the property clean and hygienic. These statements describe the rental being offered; they are more than a number of nights in a booking form.

That gives a reader a useful way to assess an incomplete explanation. If a listing says “one month, therefore no lodging permission needed” but cannot provide the rental agreement or explain the management arrangement, it has left out other conditions in the guidance. Ask for those documents and answers before relying on the claim.

Buying cleaning supplies yourself does not make the property a rental. Optional cleaning does not, by itself, make it a hotel either. The official guidance looks at the whole arrangement, so one household task cannot answer the question.

The cancellation safeguard is easy to miss

The way a booking works matters as much as its advertised minimum.

Imagine a listing that shows a month-long minimum but routinely invites guests to book the month and immediately cancel all but three nights. The business is planning a three-night lodging stay while advertising a month-long rental. The notice calls for measures to prevent bookings being shortened without a legitimate reason in this way.

This does not prescribe one cancellation fee for all monthly apartments or establish that a non-refundable payment proves an arrangement is a residential lease. Read the cancellation terms for the contract you are offered. You still need the actual agreement to establish what you owe or can recover.

Longer lodging stays still exist

MHLW's FAQ lists geshuku as a type of lodging under the Hotel Business Act, with fees calculated by the month or for longer periods. That alone is a useful reminder that “one month” and “outside the lodging law” are not interchangeable ideas.

A licensed accommodation business can offer a longer stay. A residential rental needs to be understood on its own terms. Your immigration permission is another separate matter; a housing contract does not extend it or mean you will receive a residence card.

What to ask about your own booking

Ask the company which legal arrangement it is offering, what agreement you will receive and who is responsible for management and cleaning. If it says the home is licensed or registered for lodging, ask for its licence or registration number and the office responsible. If it says the accommodation is a residential rental, ask it to explain that arrangement without relying only on the booking length.

If you cannot tell which rules apply, send the listing and proposed contract to the public health centre responsible for the address. MHLW directs these questions to that local office. You do not need to interpret the notice alone, and you should not have to choose between accepting an unsupported legal claim and abandoning an otherwise suitable home.