Every property owner in Japan pays an annual fixed asset tax (固定資産税, kotei shisan zei), and the figure that determines how much you owe is the fixed asset tax assessed value (固定資産税評価額, kotei shisan zei hyoka-gaku). This is a distinctly Japanese valuation system: rather than a single assessed value set once and adjusted annually, as in most US counties or under UK council tax bands, Japan runs three separate, purpose-built valuations on the same parcel of land — one for market reference, one for inheritance and gift tax, and this one for fixed asset tax — each recalculated on its own schedule. Understanding how the assessed value works is directly tied to accurately budgeting your holding costs and planning your tax strategy. Even so, in my experience very few owners actually look closely at what is behind the number on their tax notice. This article walks through how the assessed value is determined, three ways to check it, how to estimate your tax bill, the main reduction measures available, and what to do if you disagree with the figure.
What Is the Fixed Asset Tax Assessed Value?
The fixed asset tax assessed value is the benchmark price that each municipality (in Tokyo's 23 special wards, the Tokyo Metropolitan Government) sets in order to calculate fixed asset tax. Following the Fixed Asset Valuation Standards (固定資産評価基準, kotei shisan hyoka kijun) established by the Minister of Internal Affairs and Communications, the mayor of each municipality determines a price for every individual parcel of land and every building, and registers it in the fixed asset tax roll (固定資産課税台帳, kotei shisan kazei daicho). The roadside price used to value residential land in built-up areas is called the fixed asset tax roadside price, which is a separate figure from the inheritance tax roadside price used to calculate inheritance and gift tax.
This assessed value affects more than just fixed asset tax. It also forms the tax base for city planning tax, real estate acquisition tax, and registration and license tax. In other words, it is a figure that matters across the entire life cycle of owning property in Japan — at purchase, throughout ownership, and at inheritance or transfer. That is exactly why it is worth checking at the earliest stage of an investment decision. Japanese land carries several parallel valuations, each built for a different purpose, and grasping how they relate to one another makes the whole system much easier to follow — for an investor used to a single assessed value back home, this multi-price structure is one of the first adjustments to make.
| Type of Price | Main Use | Approx. Level vs. Published Land Price | Frequency of Determination |
|---|---|---|---|
| Published land price | Reference for transactions | 100% | Every January 1 |
| Inheritance tax roadside price | Inheritance and gift tax | approx. 80% | Every January 1 |
| Fixed asset tax assessed value | Fixed asset tax, city planning tax, and more | approx. 70% | In principle, once every 3 years |
How Land and Buildings Are Valued Differently
Land: Valued Primarily by the Roadside Price Method
Residential land in built-up areas is, in principle, valued by multiplying the fixed asset tax roadside price assigned to the road it faces by the land's area. That base figure is then adjusted with correction factors for individual circumstances — a narrow frontage, an unusually deep lot, an irregular shape, or a corner-lot position, for example. As a guideline, a parcel's assessed value runs at roughly 70% of the published land price, but the actual level swings considerably depending on road access, the zoning district, and whether the land sits inside an urbanization promotion area or an urbanization control area.
Buildings: Determined by the Replacement Cost Method
Buildings are valued by first calculating the replacement cost — what it would cost to construct an identical building today — and then applying a depreciation adjustment based on the number of years elapsed. The important point here is that the purchase price or the actual construction contract amount is not itself the assessed value. As a rough guideline, a newly built home's assessed value tends to run at roughly 50-60% of the construction contract amount, though this is only a general tendency, not a fixed formula.
There is one more point I want to be candid about. The depreciation correction rate for buildings has a floor (in principle, 0.2), so no matter how many years pass, the assessed value never reaches zero. This is a meaningful contrast with the accounting depreciation many overseas investors are used to: a building's book value can be written down to a nominal amount for accounting purposes, but its fixed asset tax assessed value will keep generating a real, non-trivial tax bill indefinitely. Anyone deciding whether to keep holding an older building needs to factor this floor into the calculation.
Reassessment Once Every Three Years
In principle, the assessed value is reviewed once every three years, in what is called a base year (基準年度, kijun nendo). The most recent base year was fiscal 2024 (Reiwa 6), and the next reassessment is scheduled for fiscal 2027 (Reiwa 9). A building's assessed value falls over time, but land can move the other way: if nearby redevelopment or road improvements progress, the assessed value can actually rise. On top of that, land is subject to a burden-adjustment mechanism (負担調整措置) that phases in increases to the assessed value gradually, meaning the tax bill can still shift even in the years between formal reassessments. Long-term cash-flow projections for a Japanese property should be built on the assumption that this supposedly fixed cost is not actually fixed.
Three Ways to Check Your Fixed Asset Tax Assessed Value
| Method | When You Can Obtain It | Approx. Cost | Best Suited For |
|---|---|---|---|
| Tax notice statement | Mailed around April-June each year | Free | Checking the tax and assessed value for property you already own |
| Public inspection/viewing of the tax roll | A set period each year starting in April | Free or low-cost | Comparing with neighboring properties; verifying fairness of the assessment |
| Certificate of assessed value | Available to request year-round | A few hundred yen per copy (approx. USD 2-3) | Situations requiring official proof, such as registration, inheritance, or a sale |
The Tax Notice Statement
This document arrives together with the tax payment notice each year, typically between April and June, and it is the simplest way to check the assessed value. Because it is sent only to whoever owned the property as of January 1 (the taxable date, 賦課期日, fuka kijitsu), a buyer who acquires a property partway through the year will not receive that year's own copy. In standard sale practice, the seller hands a copy over to the buyer as part of the transaction.
Public Inspection of the Fixed Asset Tax Roll
During a designated viewing period (縦覧, juran), taxpayers on land and buildings can check the assessed values of other land and buildings within the same municipality — something that would be unusual in many overseas jurisdictions, where assessment records are either fully public online or fully private. It is a valuable opportunity to compare your own property's assessed value against neighboring properties and verify that the assessment is being applied fairly. The period generally runs from April 1 to April 20, or until the due date of the first installment payment, whichever is later, though the exact operation varies by municipality, so check with the local government office beforehand. Note that viewing the tax roll for one's own asset is a separate system from this public viewing period, and tenants under a land lease or building lease can also request to view the relevant portion.
Certificate of Assessed Value
If you have lost your tax notice statement, or you need official documentary proof for registration or inheritance procedures, you can obtain this certificate from the municipal office where the property is located. Identification is required, and an agent acting on your behalf will be asked for a power of attorney. When an heir requests the certificate, they are generally asked to submit a family register (koseki) or similar document showing their relationship to the deceased.
How to Calculate Your Tax Bill From the Assessed Value
The formula for fixed asset tax is: taxable base amount x tax rate. The standard rate is 1.4%, though a municipality's own ordinance can set a different rate. For property inside an urbanization promotion area, city planning tax is added on top, capped at 0.3%. Combined, that is a maximum of around 1.7% — for comparison, effective property tax rates in the United States commonly range from roughly 0.5% to over 2% depending on the state, so Japan's headline rate sits in a broadly similar range, but the taxable base it is applied to is where the real difference lies. The point to watch is that the assessed value and the taxable base amount are not necessarily the same figure. Once the residential land special exemption or the burden-adjustment measure is applied, the taxable base ends up smaller than the assessed value.
As a worked example, imagine a property with a land assessed value of JPY 20,000,000 (approx. USD 129,000 at 155 JPY/USD, on a 180 sq m residential lot) and a building assessed value of JPY 10,000,000 (approx. USD 64,500). Because the land is 200 sq m or smaller, it qualifies as small-scale residential land, so its taxable base is one-sixth of the assessed value, or about JPY 3,330,000 (approx. USD 21,500). Multiplying by 1.4% gives roughly JPY 47,000 (approx. USD 300) for the land and JPY 140,000 (approx. USD 900) for the building, for a combined annual fixed asset tax of around JPY 187,000 (approx. USD 1,200). In practice, city planning tax, various reduction measures, and rounding will also apply, so check your own tax payment notice for the precise figure.
The Residential Land Special Exemption and Key Reduction Measures
The Residential Land Special Exemption
Land used as the site of a residential building qualifies for a special exemption that shrinks the taxable base. This exemption is conditional on a home actually standing on the site as of the taxable date of January 1; if the building has already been demolished and the land is vacant on that date, the exemption is, in principle, not available for that fiscal year. This is a trap that catches out more than a few owners: demolishing a building in December to clear the way for a rebuild in the new year can push a property's land tax up sharply overnight. The timing of demolition therefore has a direct effect on the tax bill, which makes running the numbers in advance essential.
| Category | Area Covered | Fixed Asset Tax Taxable Base | City Planning Tax Taxable Base |
|---|---|---|---|
| Small-scale residential land | Up to 200 sq m per dwelling unit | 1/6 of assessed value | 1/3 of assessed value |
| General residential land | The portion exceeding 200 sq m (up to 10x the home's floor area) | 1/3 of assessed value | 2/3 of assessed value |
The New-Build Reduction and the Minimum Taxable Threshold
A newly built home that meets certain requirements gets its fixed asset tax cut in half for the portion of the residential floor area up to 120 sq m, for an initial set number of years (city planning tax is not eligible for this reduction). The reduction generally runs for 3 fiscal years for an ordinary home, and 5 fiscal years for a fire-resistant or quasi-fire-resistant building of three or more stories, with a longer period for homes certified as long-life quality housing (認定長期優良住宅). Because the floor-area requirements and the deadline for this measure have been revised repeatedly, confirm the latest conditions before construction begins, not after. There is also a minimum taxable threshold (免税点, menzeiten): if the same owner's total taxable base within a single municipality comes to under JPY 300,000 for land (approx. USD 1,900) or under JPY 200,000 for buildings (approx. USD 1,300), no fixed asset tax is levied at all — a detail that mainly matters for very small or fractional land holdings.
How Building Structure and Specifications Affect the Assessed Value
A building's assessed value moves with its structure, materials, and the grade of its fittings. Steel-frame and reinforced-concrete construction are valued at a higher replacement cost than wood-frame construction, and the specification of exterior walls, roofing, and insulation performance all feed into the number. The quality, quantity, and scale of plumbing and water fixtures, and ancillary equipment such as elevators or mechanical parking systems, are also part of the assessment.
A question I hear often from investors is: if the rent I can charge is the same either way, isn't it better to keep construction costs down? My answer is that it is not that simple. Lowering the specification does lower the assessed value and the fixed asset tax. But it also tends to raise maintenance frequency and lower tenant satisfaction, and the resulting opportunity cost can easily exceed whatever tax you saved. For a long-term hold, the more rational approach is to put the tax burden, profitability, and durability side by side on the same table and compare them together, rather than optimizing for the tax line alone.
Points to Watch When Renovating
A simple interior refresh normally has no effect on the assessed value. But an extension or a large-scale renovation that requires a building confirmation application can trigger a reassessment of the building's value. When weighing a value-add renovation, build your payback plan around the increase in tax burden as well as the construction cost and the expected rent increase — not just the latter two. Conversely, if you demolish part of a building, there are cases where you need to proactively notify the municipality to have the assessed value reduced; it is not always applied automatically.
What to Do If You Disagree With the Assessed Value
Fixed asset tax works on an assessment-and-notice basis (賦課課税方式): the municipality calculates the amount and simply notifies the owner, unlike a self-assessment system where the taxpayer files the initial figure. That places the burden of verification back on the owner's side. In practice, errors such as a mismatched land-use category, an incorrect building-use classification, or continued taxation on a building that was actually demolished, are far from rare.
If you disagree with the assessed value itself, you can, in principle, file a request for review with the Fixed Asset Valuation Review Board (固定資産評価審査委員会) set up by the municipality (or the Tokyo Metropolitan Government for Tokyo's 23 wards), within three months of the day after you received the tax notice. Because this process generally targets the price set in the base year, the practical move is to complete your comparison with neighboring properties during the public viewing period beforehand. Separately, if you discover an overpayment caused by a calculation error or a factual mistake, you can pursue a refund claim with the municipality independent of the review board process. Under the Local Tax Act, the right to claim a refund for an overpaid amount generally lapses after five years, and how amounts older than that are handled varies by each municipality's own internal guidelines — so as soon as you notice a discrepancy, contact the local tax office promptly rather than waiting.
The INA&Associates Perspective and Summary
At INA&Associates, we do not treat the fixed asset tax assessed value as a target for tax-minimization tricks. We treat it as one of the mirrors that reflects a property's true underlying quality. Whenever a property's assessed value and its actual market price diverge significantly, there is always a reason — road access conditions, legal and zoning restrictions, or physical obsolescence of the building. Working through each of those reasons one by one is what ultimately sharpens the precision of an acquisition decision.
Managing real estate is work that sits at the intersection of tax, legal, and construction expertise. The reason we put jinzai koso saidai no shisan (人財こそ最大の資産, roughly, our people are our greatest asset) at the top of our core values is that this kind of cross-disciplinary judgment ultimately rests on human experience and integrity, not on any single technical rule. Our policy toward clients is to be candid about downsides too, including a rising future tax burden or other risks, not just the upside. Here are the practical points to keep in mind:
- When considering a purchase, obtain the tax notice statement and separately confirm the assessed value and the taxable base amount for the land and for the building.
- Check whether the property sits inside an urbanization promotion area, and estimate the annual holding cost including city planning tax.
- Confirm the current base year, and build the range of possible assessed-value movement into your long-term cash-flow projections.
- Before clearing land, demolishing a building, or undertaking a large-scale renovation, run the numbers on whether the special exemption still applies and how the tax burden will change.
- Check the tax notice statement itself for factual errors in the land-use category, use classification, or floor area.
This system is revised repeatedly, and the details of how it is administered differ from one municipality to the next. Do not rely on general rules of thumb alone — check both the latest version of the system and the tax notice statement in your hand. And if you are still unsure after that, we would encourage you to consult a licensed tax accountant or a practitioner like us. Related analysis articles are collected on the INA NETWORK category page.
- Why Rent Setting Determines Your Sale Price: How a JPY 10,000 (approx. USD 65) Monthly Difference Creates JPY 3 Million (approx. USD 19,400) in Asset Value
- Why Is Real Estate Investment So Hard? The Three Walls of Tax, Law, and Construction Explained
Frequently Asked Questions
What Is the Standard Tax Rate for Fixed Asset Tax?
The standard rate is 1.4%. That said, a municipality's own ordinance may set a different rate. For property inside an urbanization promotion area, city planning tax (capped at 0.3%) is added on top. Residential land also carries a special exemption: for the portion up to 200 sq m per dwelling unit (small-scale residential land), the fixed asset tax taxable base is, in principle, reduced to one-sixth of the assessed value.
What Should I Do If I Think My Assessed Value Is Too High?
First, check the factual details on your tax notice statement — the land area, floor area, land-use category, and use classification — for any errors. Then compare your property against neighboring ones during the public viewing period that starts in April, and if you still disagree with the assessed value itself, consider filing a request for review with the Fixed Asset Valuation Review Board. That request generally has to be filed within three months of the day after you received the tax notice.
Is the Inheritance Tax Assessed Value the Same as the Fixed Asset Tax Assessed Value?
No, they are different. Land for inheritance tax purposes is valued using either the roadside price method or the multiplier method, and this figure tends to come out higher than the fixed asset tax assessed value. Buildings, on the other hand, generally use the fixed asset tax assessed value directly as the inheritance tax value. For inheritance planning, it is important to track both figures separately rather than assuming one stands in for the other.
Does Fixed Asset Tax Increase on a Vacant House?
Yes, it can. This is Japan's answer to the vacant-house (akiya) problem that has drawn increasing international attention: if a poorly maintained vacant house is designated by the municipality as a specified vacant house (特定空家等, tokutei akiya-to) and receives an official advisory, its land loses the residential land special exemption. Then, following the revised Act on Special Measures for Vacant House Countermeasures (改正空家等対策特別措置法) that took effect in December 2023, a broader category, poorly-managed vacant houses at risk of becoming specified vacant houses (管理不全空家等, kanri fuzen akiya-to), can now lose the same exemption once they receive an advisory. As a result, for small-scale residential land, the land's taxable base reverts from one-sixth of the assessed value back to its full level, and the tax bill can jump sharply. If you own a vacant property in Japan, it is worth maintaining it properly and moving early on a decision to either put it to use or sell it, rather than letting the advisory notice arrive first.
