When Japan’s minpaku law took full effect back in 2018, I watched three landlords I knew in the Osaka area shut down their short-term rental listings within the first year. The reason was almost always the same: a 180-day annual cap on operating days that gutted the income projections they had built their business plans around. I manage 9 rental properties myself, all self-managed for over 15 years, and I seriously considered converting two of my smaller studio units into short-term rentals before the law forced me to run the real numbers.
What follows is what I learned going through the registration process myself, the fire safety upgrades I didn’t expect, and what it actually costs to stay compliant month after month once you’re operating under this system.
What the Minpaku Law Actually Covers
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The Private Lodging Business Act, known locally as Juutaku Shukuhaku Jigyou Hou, is a notification-based system run through your local municipal government rather than a full hotel license. You register your residential unit as a private lodging, and the local government issues a business number that has to appear on every listing, on Airbnb or otherwise. It sits in a different category from a full ryokan or hotel business license, and it’s also distinct from the simple lodging license, which allows unlimited operating days but comes with stricter building code requirements that most ordinary apartments can’t meet.
For an existing residential property like mine, minpaku registration was the only realistic path to legally operating a short-term rental without a full commercial building conversion.
The 180-Day Cap That Changes Everything
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The headline restriction is that a registered minpaku property can only host paying guests for a maximum of 180 days per calendar year. That number alone reshapes the entire business case, because it means roughly half the year the unit has to sit empty or be rented long-term instead, and switching a unit back and forth between short-term and long-term tenants creates its own logistics headache.
What surprised me more was that my own ward layered on an additional restriction for units in residential zoning: guests could only be hosted on 105 of those 180 days, and weekday-only in certain months. That local add-on cut my realistic annual revenue projection by close to 40 percent compared to what I’d budgeted using the national cap alone, which is the main reason I only converted one property instead of two.
Registration, Fire Safety, and the Paperwork I Didn’t Expect
The application itself took 47 days from submission to approval, longer than the roughly three weeks I’d been told to expect, mostly because the fire department inspection had to be scheduled separately from the housing division review. Fire safety was the biggest surprise cost. Even a small one-bedroom unit needed an interconnected smoke alarm system, emergency lighting in the hallway, and evacuation signage in two languages, which came to just over 350,000 yen for the single unit I converted.
On top of that, registered operators have to submit occupancy reports to the local government every two months, listing guest nationality counts and total nights stayed. It’s not difficult, but it’s one more recurring task that a standard long-term rental never requires.
Minpaku Versus a Standard Long-Term Rental
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Before converting anything, I made myself a simple checklist to compare the two paths side by side. If you’re weighing the same decision, these are the questions I’d walk through first:
- Can your unit realistically hit 55 percent or higher occupancy within the 180-day (or lower, if your ward restricts it further) cap?
- Are you prepared for fire safety upgrade costs in the 300,000 to 500,000 yen range depending on unit size?
- Can you handle guest turnover, cleaning, and key exchange yourself, or will you need to pay a management company roughly 15 to 20 percent of revenue?
- Does your building’s management association or condominium bylaws even permit minpaku use, since many do not?
- Would the same unit rent reliably long-term for a predictable monthly amount with none of the above overhead?
That last point is the one that ends most conversions before they start. A lot of owners forget to compare against their actual current rent rather than an optimistic best case.
What It Actually Cost Me and Whether It Paid Off
After the first full year running my one converted unit, it brought in about 1.1 million yen in gross short-term revenue at 62 percent occupancy within my allowed days, against roughly 840,000 yen a year the same unit earned as a standard long-term rental. Subtract the fire safety investment, cleaning costs, and platform fees, and the net gain in year one was closer to 90,000 yen, not the dramatic upside a lot of minpaku guides promise. Year two looked better once the upfront costs were behind me, closer to a 30 percent net improvement over long-term rent.
My Verdict After Running Both Systems
Minpaku registration made sense for exactly one of my 9 properties, the one in a tourist-adjacent area with genuine short-term demand and lenient local zoning rules. For the rest, the paperwork, the day caps, and the fire safety costs simply don’t clear the bar over a stable long-term tenant. If you’re considering it, call your ward office before you call a property management company, because the local restrictions on top of the national 180-day rule are what actually determine whether the math works.
That’s the approach I use across all 9 of my properties: run the real numbers for your specific ward before you spend a single yen on fire alarms.
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