Income Property in Japan: Whole-Building Analysis

Whole building (ippon) vs single unit (kubun)

Two ways to invest in Japanese residential real estate stand opposed:

• ippon-mono (ippon-mono, 一棟物, whole building): you buy the entire building and its land. You control the land, the works and the rents, and capture the full yield.
• kubun (kubun, -ku分, condominium unit): you buy a single flat in a shared building, with management fees kanri-hi (kanri-hi, management charges) and a repair fund shuzen tsumitate-kin (shūzen tsumitatekin, major-repair reserve).

Criterion	ippon-mono (whole building)	kubun (unit)
Entry ticket	High	Affordable
Gross yield	Often higher	Lower
Control	Full (land included)	Limited by the co-ownership
Vacancy risk	Diversified across units	Binary (let / empty)
Major repairs	Entirely on you	Pooled fund
Resale	Narrower market	Broad, liquid market

The whole building suits investors chasing yield who accept active management. The unit suits a first purchase. Our Japan buying guide details both routes.

Structures: concrete (RC/SRC) vs wood and steel

The structure governs lifespan, tax depreciation and net yield. The main categories:

• RC (reinforced concrete) and SRC (steel-reinforced concrete): the strongest and most durable, statutory useful life hoteki taiyo nensu (hōtei taiyō nensū, legal depreciation life) of 47 years. Ideal for a multi-unit building, but a higher price per sqm.
• Steel (S): intermediate tax life (often 34 years depending on thickness), a cost/durability trade-off.
• Wood (mokuzo) (mokuzo, mokuzō, timber construction): tax life of 22 years. Low purchase price, high gross yield, but fast depreciation and earlier ageing — common on small provincial income buildings and akiya.

This is central to tax strategy: the older or more timber-built the structure, the faster and more concentrated the depreciation genka shokyaku (genka shōkyaku, depreciation). See our dedicated article on property depreciation in Japan.

Analysing yield: gross, net and occupancy

Three indicators to distinguish:

Gross yield (hyomen rimawari)

Annual rents ÷ purchase price. This is the figure shown in listings, rimawari (利回り, yield). It flatters, ignoring costs and vacancy.

Net yield (jisshitsu rimawari)

You deduct property tax, management, insurance, maintenance, a repair reserve, and above all real vacancy. An order-of-magnitude example:

Item (8-unit building)	Effect on yield
Full rents (advertised gross)	e.g. 9-12%
Vacancy and arrears	-1 to -2 pts
Property tax + management + insurance	-1.5 to -2.5 pts
Major-repair reserve	-0.5 to -1 pt
Real net yield	often 5-8%

Occupancy rate (nyukyo-ritsu)

The nyukyo-ritsu (入居率, occupancy rate) is vital on a whole building: one at 60% occupancy in a shrinking town is a trap, however high the gross yield. Check local demographics and rental demand. Our yield simulator factors in vacancy and costs to output a realistic net.

Age, depreciation and major repairs

The age of an income building drives two things:

• Tax depreciation: an old building depreciates fast (short residual life), creating a large accounting charge that cuts tax in the early years. Detail in property depreciation in Japan.
• Major repairs (daikibo shuzen): daikibo shuzen (大規模修繕, large-scale repairs) — roof, facade, waterproofing, lift — recur every 12-15 years and are costly. On an ippon-mono they are entirely on you, with no pooled fund. Reserve from day one.

Common mistake

Buying a 25-year-old timber building at 12% gross yield without budgeting for structural and common-area renewal. The net can collapse. Demand a technical survey and the works history before signing.

On the seismic standard, favour buildings after the 1981 shin-taishin (shin-taishin, new earthquake standard), more insurable and more liquid on resale.

Cash financing, management and risks

Financing: essential reminder — a Japanese property loan is reserved for resident salaried buyers in Japan. A non-resident foreign investor therefore funds the income building in cash. On moving funds, see financing a Japan purchase from France and the property loan for foreigners.

Management: a whole building needs a management company kanri gaisha (kanri-gaisha, management company) for inventories, rents, re-letting and day-to-day upkeep, especially remotely. See our article on remote rental management.

Main risks:

• concentrated vacancy if the building is single-typology in a declining town;
• unreserved major repairs;
• resale less liquid than a unit;
• earthquake and natural disaster (insurance and hazard map).

Tax: rents fall under rental income for non-residents, holding incurs property tax, and resale the capital-gains tax.

Conclusion

The ippon-mono income building is the tool for investors who want yield and land control. It rewards rigorous analysis (structure, age, occupancy, repair reserve) and punishes buying on advertised gross yield alone. Cash-funded for a foreigner, it demands professional remote management. Compare it to Airbnb yields by city, discuss your strategy through our support, and browse our listings.

Frequently asked questions

What is an income property in Japan?

It is an ippon-mono: buying a whole building with its land, rather than a single condominium unit (kubun). You capture the full yield and control the land and works, but shoulder vacancy and major repairs alone. It is a yield asset for hands-on investors.

Is it better to buy a whole building or a single unit in Japan?

The whole building (ippon) offers higher gross yield and land control, but a high ticket and major repairs on you. The unit (kubun) is more affordable, more liquid on resale and pools the repair fund, at the cost of a lower yield. The choice depends on your capital and appetite for management.

Can a foreigner finance an income building in Japan?

In practice not via a Japanese loan: that is reserved for resident salaried buyers in Japan. A non-resident foreign investor funds the building in cash, possibly by mobilising savings or an asset-backed loan in their home country, then transfers the funds to Japan.

Which structure to choose: concrete or wood?

Concrete (RC/SRC, 47-year tax life) is the most durable and insurable but pricier to buy. Wood (mokuzo, 22 years) shows a high gross yield and fast, tax-useful depreciation, at the cost of earlier ageing. Steel sits between. The choice depends on your horizon and depreciation strategy.

What are the main risks of an income building?

Concentrated vacancy in a demographically declining town, unreserved daikibo shuzen major repairs (roof, facade, lift every 12-15 years), resale less liquid than a unit, and seismic risk. Favour post-1981 construction and always check the real occupancy rate and local demographics.