Share House Japan: Costs, Rules and How to Invest

What a share house really is (and what it is not)

A Japanese share house (sheahausu, シェアハウス) is a single building divided into private lockable rooms, with a shared kitchen, shared bathrooms and a common living room. The operator signs one contract per room, furnishes everything, and bills a single monthly figure that usually swallows electricity, gas, water and fibre internet.

Three neighbouring things are often confused with it, and the difference is legal, not cosmetic:

• Room share: friends or a couple sign one ordinary lease together and split it. The Ministry of Land, Infrastructure, Transport and Tourism (Kokudo Kōtsū-shō, MLIT) explicitly says this is not a share house in the regulatory sense.
• Guest house: in Japan the word often means the same thing as a share house, especially in listings aimed at foreigners. Historically a gaijin hausu (外人ハウス) was the cheap, no-guarantor version.
• Social apartment: a newer, higher end format with a gym, a cinema room or a co-working floor, priced well above a standard share house.

A market that is bigger than most foreigners assume

The Japan Share House Federation (ippan社団hōjin日本シェアハウス連盟) counted 5,943 properties and roughly 65,000 beds nationwide as of 25 November 2025, in its survey published on 20 May 2026. Tokyo alone accounts for 60 to 70 percent of them, concentrated in the 23 wards. More than nine properties out of ten house 29 residents or fewer, and the federation notes a clear shift: very small properties (four residents or fewer) have shrunk in Tokyo while mid-sized ones (10 to 29 residents) have more than doubled, from 771 to 1,754 buildings.

That shift matters if you are buying. The market is moving away from a spare room rented out casually, and towards a properly converted building of eight to twenty rooms run as a business.

What it costs to live in one

The monthly rent is the visible number, and it is not where a share house wins. It wins on what you pay before you move in.

Oakhouse, one of the largest operators in the capital with more than 6,000 rooms, publishes average rents by district that run from about 37,976 yen ($243) in Akishima, out in western Tokyo, to 96,371 yen ($618) in Shinjuku. A private room in a central ward with its own sink generally lands between 60,000 and 85,000 yen ($385 to $545).

Item	Share house	Conventional 1K apartment
Monthly rent, Tokyo	38,000 to 96,000 yen	80,000 to 110,000 yen
Utilities and internet	Usually included	Separate, 10,000 to 15,000 yen
Furniture and appliances	Provided	You buy everything
Deposit (shikikin, 敷金)	0 to 1 month	1 to 2 months
Key money (reikin, 礼金)	None	0 to 2 months, non refundable
Agency fee	Usually none	1 month plus tax
Guarantor	Often waived	Guarantor company, 50 to 100 percent of a month
Realistic cash to move in	1 to 2 months of rent	4 to 6 months of rent

For a newly arrived foreigner without a Japanese guarantor, a credit history or a hanko (判子, personal seal), that last line is the whole story. A share house is frequently the only door that opens in the first weeks. Our article on opening a Japanese bank account as a foreigner covers the paperwork that follows.

The costs nobody advertises

• Contract fee (keiyakukin): 20,000 to 40,000 yen on signature at most operators, non refundable.
• Cleaning fee on exit: 20,000 to 50,000 yen, often deducted from the deposit.
• Short stay penalty: leaving before the minimum term, commonly one to three months, usually costs one month of rent.

The contract you actually sign

Most share house contracts in Japan are not the residential lease you would sign for an apartment. Operators generally use a fixed-term lease (teiki shakka keiyaku, 定期shakuyakeiyaku) or an occupancy agreement covering one room plus the right to use common areas.

The practical consequences:

• Notice is short and symmetrical: 30 days on both sides is the norm, against the strong tenant protection an ordinary lease gives.
• There is no automatic renewal with a fixed-term contract: the operator can decline to renew at the end of the term, without the "just cause" (seitō jiyū, 正当事由) a normal landlord would need.
• House rules are contractual: guests, overnight visitors, smoking, cooking hours. Breaking them repeatedly is a termination ground.
• Your room number can change: some contracts let the operator move you within the building.

Read the clause on jūyō jikō setsumei (jūyō jikō setsumei, the statutory pre-contract disclosure) too. It is mandatory for a brokered lease and it is where the building's real status, including its zoning and fire compliance, has to appear. We break that document down in our guide to reading the jūyō jikō setsumei before you sign.

The rule that changed everything for owners: a share house is a dormitory

This is the section that separates people who make money from share houses in Japan from people who lose it.

On 6 September 2013, MLIT notified every building authority in the country that a share house is a dormitory (kishukusha, 寄-shuku舎) under the Building Standards Act, not an ordinary dwelling. The industry still calls it the "9.6 shock", because the overwhelming majority of properties operating at the time did not meet the dormitory standard. Renting rooms out of a house you bought as a house does not make it legal.

What the dormitory classification requires

• Fire-resisting partition walls (bōka-jō shuyō na majikiri kabe, 防火上主要な間仕切壁) between rooms, built to a semi-fire-resistant standard and continued up to the underside of the floor or roof above, not stopping at the ceiling. In a timber Japanese house this is the single most expensive item.
• Fire safety equipment: a share house falls under item 5-ro (5項ロ) of the Fire Service Act, alongside dormitories and boarding houses. That triggers an automatic fire alarm system. A simplified system for small premises is allowed for buildings of two storeys and under 300 square metres.
• Escape routes: corridor widths and, above certain sizes, two means of escape.

The exemptions that make small projects viable

The rule has since been made more workable. Partition walls can be waived where sprinklers are installed, and MLIT notification No. 869 of 22 August 2014 also exempts small, easily evacuated buildings fitted with smoke detectors in every room. A five or six-room conversion of a detached house is usually the format where this matters most, so ask your architect which route the building qualifies for before you sign.

The change of use filing

Converting a house into a dormitory is a change of use (yōto henkō, yōto henkō). Since the Building Standards Act reform that took effect on 25 June 2019, the confirmation application is only required when the converted area exceeds 200 square metres, up from 100. The trap is well known to Japanese practitioners and unknown to most foreign buyers: no filing does not mean no rules. Below 200 square metres you skip the paperwork, but the building must still comply with the Building Standards Act and the Fire Service Act in full. A fire in a non-compliant share house is an insurance and liability problem of a different order.

Share house, minpaku or ryokan: which model for which building

Foreign investors usually arrive with short-term rental in mind and discover the 180-night cap. Putting the three models side by side clarifies the decision quickly.

	Share house	Minpaku (minpaku)	Kan'i shukusho (kan'i shukusho)
Legal basis	Residential lease, dormitory under the Building Standards Act	Private Lodging Business Act	Hotel Business Act (ryokan gyō-hō)
Formality	No hospitality licence	Notification	Licence from the health authority
Nights per year	Unlimited	180 maximum	Unlimited
Income pattern	Stable, monthly	Seasonal, volatile	Seasonal, volatile
Operating load	Low: no daily turnover	High: cleaning, check-in, platforms	High
Local restrictions	Zoning (yōto chiiki, yōto chiiki)	Frequent municipal limits	Zoning, often blocked in residential zones
Typical gross yield	Moderate and predictable	Higher ceiling, higher variance	Higher ceiling, higher variance

The share house wins on one axis that matters enormously when you live abroad: it has no daily operations. Nobody checks in at 11 p.m., nobody complains about a missing towel, and the income does not collapse with a travel slump. Read our comparison of the two licences in the 180-night minpaku licence and the year-round ryokan licence, and the real cost base of the short-term model in what running an Airbnb in Japan actually costs.

A worked example: converting a 8 million yen house

Here is a realistic projection for a detached house of about 130 square metres, in a suburb 25 minutes by train from a regional city centre, the kind of property listed in our akiya and Japanese house listings and in the houses under $100,000 selection. Every figure below is an estimate, not a promise.

Line	Yen	USD (156 yen per dollar)
Purchase price	8,000,000	$51,300
Acquisition costs (6 percent ceiling)	480,000	$3,080
Conversion: partitions, fire alarm, two extra bathrooms, kitchen	6,000,000	$38,500
Furniture for 5 rooms and common areas	900,000	$5,770
Total invested	15,380,000	$98,650

Annual operation	Yen
5 rooms at 45,000 yen, 85 percent occupancy	+2,295,000
Utilities and internet (included in rent, so an owner cost)	-480,000
Management at 15 percent of collected rent	-344,000
Turnover cleaning and maintenance	-250,000
Fixed asset and city planning tax	-110,000
Insurance	-45,000
Net before tax	+1,066,000

That is roughly 6.9 percent net on the total invested, before income tax. The same house let to a single family would bring perhaps 85,000 yen a month, about 1,020,000 yen gross and near 700,000 net, on a much smaller conversion budget. The share house earns more, but it earns it by being a small business rather than a passive asset, and the conversion budget is what decides whether the gap is worth it.

What moves this number the most

• Occupancy, not rent. Losing one more room to a long vacancy removes about 540,000 yen of gross rent a year and takes the net down to roughly 3.9 percent. Location near a station and a university or a business district is what fills rooms.
• The partition wall bill. Quotes for the same house routinely vary by a factor of two depending on whether sprinklers, detectors or full partitions are the chosen route.
• Utilities. A flat-rate inclusive rent transfers the energy risk to you. Poorly insulated houses burn through it: see why Japanese houses are so cold and what insulation costs.

You can run your own version of these numbers with our yield simulator.

The cautionary tale every investor should know: Kabocha no Basha

Between 2015 and 2018, an operator called Smart Days sold Japanese salaried workers a women-only share house brand, Kabocha no Basha (かぼちゃの馬車), on the promise of a guaranteed rent master lease. Suruga Bank lent more than 100 billion yen to roughly 700 buyers. Smart Days went bankrupt in April 2018, the guaranteed payments stopped, and the owners were left with mortgages on buildings that could not fill their rooms.

The Financial Services Agency found that numerous bank employees had been involved in forging documents, including fake deposit records used to inflate buyers' apparent equity. In March 2021 Suruga Bank cancelled the loans of 257 share house owners, and a further group of 336 borrowers pursued damages claims.

The lessons transfer directly to a foreign buyer today:

• A guaranteed rent (saburīsu, サブリース) is only as good as the company guaranteeing it. The guarantee is contractual, not statutory, and Japanese master lease contracts usually allow the operator to revise the rent downwards.
• Verify occupancy yourself. Ask for the rent roll of the last 24 months, room by room, not an average.
• Price the building on its own letting potential, without the guarantee. If it only works with the master lease, you are buying the operator, not the property.
• Distrust a yield that stands out. Nationwide, share house projects that work are ordinary buildings in ordinary locations, not 12 percent promises.

Mistakes to avoid, and what experienced owners do instead

The five mistakes that cost the most

1. Buying first, asking the building authority second. Whether your building can become a dormitory depends on its zoning, its road access, its structure and its age. Settle this before the kaitsuke iraisho (kaitsuke依頼書, the written purchase offer), not after.
2. Assuming that under 200 square metres means unregulated. It means no confirmation application. The Building Standards Act and the Fire Service Act still apply in full.
3. Ignoring the neighbourhood. A share house brings coming and going to a quiet street. The neighbourhood association (chōnaikai, 町内会) can make life very difficult, and municipalities do act on complaints.
4. Believing a mortgage will be available. In practice, Japanese banks lend for property only to people who live in Japan and are employed there. A foreign non-resident buys a share house in cash. See mortgages in Japan for foreigners.
5. Expecting a visa. Owning property in Japan, however profitable, grants no residence status of any kind. Running the business through a company is a separate route with its own capital and substance requirements.

What the experienced owners do

• They target eight to fifteen rooms: below that, the fixed costs of compliance and management eat the margin; above 29 residents the regulatory bracket gets heavier.
• They buy within 10 minutes' walk of a station on a line that serves a university or a business district, and accept a worse house for a better address.
• They hire a local operator on a management contract (10 to 20 percent of collected rent) rather than a master lease, keeping the upside and the rent roll visibility. Our article on managing a Japanese rental from abroad compares the two.
• They appoint a tax agent (nōzei kanrinin, nōzei kanrinin) before the first rent is collected, because a non-resident owner cannot file or receive local tax notices without one: see appointing a tax agent in Japan and how rental income is taxed for non-residents.
• They check the structure against the 1981 seismic standard before committing to a conversion budget: the shin-taishin rule explained.

Conclusion: a niche that rewards preparation

For a resident, a share house is the cheapest and fastest way into Japanese housing: one to two months of cash instead of four to six, furniture included, no guarantor hunt. For an owner, it is one of the few ways to make a large, old, inexpensive Japanese house produce several incomes instead of one, and unlike short-term rental it runs without daily operations and without a 180-night ceiling.

The price of entry is regulatory literacy. A share house is a dormitory in the eyes of Japanese building law, and that single sentence decides the conversion budget, the insurance, and whether the project is legal at all. Budget for the partition walls and the alarm from the first spreadsheet, verify occupancy rather than promises, and treat any guaranteed rent with the scepticism 700 Kabocha no Basha buyers learned the hard way.

Browse the large houses that suit this model in our listings, look specifically at kominka farmhouses for sale for volume at a low price per square metre, and read our complete guide to buying a house in Japan before you make an offer. If you want the whole acquisition handled, from search to keys, that is what our support package is for.

Frequently asked questions

What is a share house in Japan?

A building where you rent one private, lockable room and share the kitchen, bathrooms and living areas. The rent is a single monthly figure that usually includes electricity, gas, water, internet and furniture, and the move-in cost is far lower than a conventional lease.

How much does a share house cost per month in Tokyo?

Average rents published by major operators run from about 37,976 yen ($243) in outer districts such as Akishima to 96,371 yen ($618) in Shinjuku. A private room in a central ward typically sits between 60,000 and 85,000 yen ($385 to $545), utilities included.

Is a share house cheaper than an apartment in Japan?

Monthly rent is comparable or slightly lower, but the difference is upfront. A conventional lease commonly asks four to six months of rent once you add deposit, key money, agency fee and a guarantor company, against one to two months for a share house.

Can a foreigner buy and run a share house in Japan?

Yes. There is no nationality restriction on owning Japanese property and no hospitality licence is required, because tenants sign residential leases. You must bring the building up to the dormitory standard of the Building Standards Act, and owning it gives you no visa or residence status.

Do you need a licence to operate a share house in Japan?

No hotel or minpaku licence, since the residents hold leases rather than staying as guests. What you do need is compliance: the building must meet the dormitory requirements of the Building Standards Act and the fire equipment rules for item 5-ro premises.

What yield does a share house produce in Japan?

On a worked example of a house bought at 8 million yen and converted for about 7 million, five rooms at 45,000 yen with 85 percent occupancy give roughly 6.9 percent net before tax. Occupancy and the conversion bill move that number far more than the rent level does.

Is a share house the same as an Airbnb in Japan?

No. A share house rents rooms on residential leases with no annual limit on nights, while a minpaku under the Private Lodging Business Act is capped at 180 nights a year and carries daily operations. The two follow different laws and different economics.

Why is a share house classified as a dormitory in Japan?

Because MLIT notified building authorities on 6 September 2013 that share houses fall under the dormitory category of the Building Standards Act. The practical consequence is fire-resisting partition walls between rooms and an automatic fire alarm, which ordinary houses do not need.