Key Takeaways
- Japanese property valuation follows patterns that are invisible to most foreign buyers but clear in government data
- Three metrics — price per square meter, building age, and land ratio — let you assess fair value for any property
- Total price is misleading; ¥/m² is the common language of Japanese real estate
- Building age follows a predictable depreciation curve — RC buildings depreciate over 47 years for tax purposes, but market depreciation follows a different pattern
- Comparing a listing's ¥/m² against the MLIT transaction median for the same area and age range reveals whether you're looking at a fair deal or an overpriced listing
Why Total Price Is the Wrong Metric
Foreign buyers naturally compare properties by total price. A ¥60,000,000 property feels "cheaper" than a ¥75,000,000 one. But this comparison is meaningless without knowing what you're getting for the money.
Property A: ¥60,000,000 for 40m² = ¥1,500,000/m² Property B: ¥75,000,000 for 80m² = ¥937,500/m²
Property B is 25% more expensive in total — but nearly 40% cheaper per square meter. The ¥/m² comparison reveals that Property B is the better value, while the total price comparison suggests the opposite.
Japanese real estate professionals, appraisers, and experienced domestic investors all evaluate properties primarily by ¥/m² (price per square meter). This is the common language. Adopting it immediately gives you a more accurate picture of value than any total-price comparison.
The 3 Metrics That Matter
Metric 1: Price per Square Meter (㎡単価)
What it is: The property's total price divided by its floor area in square meters.
Why it matters: It normalizes comparison across different property sizes, making it possible to compare a 30m² studio against an 80m² family apartment in the same area.
How to use it: Calculate the ¥/m² for any listing and compare it against the MLIT median for the same area. JRE's Location pages show the median ¥/m² from actual transactions for each area.
| Area | MLIT Median ¥/m² (Condos) | Typical Range |
|---|---|---|
| Shinjuku | ¥1,311,111 | ¥900K–1,800K |
| Roppongi / Azabu | ¥1,925,000 | ¥1,400K–2,800K |
| Shibuya | ¥1,342,857 | ¥950K–1,900K |
| Osaka (Namba) | ¥966,667 | ¥650K–1,400K |
| Fukuoka (Tenjin) | ¥810,000 | ¥550K–1,100K |
A listing priced significantly above the median range warrants scrutiny. A listing within or below the range is more likely to represent fair value.
→ Check MLIT ¥/m² data for your area →
Metric 2: Building Age and Depreciation
What it is: The relationship between a building's age and its market value.
Why it matters: Japanese buildings depreciate — but the pattern is different from the tax depreciation schedule and different from what most foreign buyers expect.
Tax depreciation schedules:
- Reinforced concrete (RC / 鉄筋コンクリート造): 47 years
- Steel frame (鉄骨造): 34 years
- Wood (木造): 22 years
These are tax rules, not market reality. A well-maintained RC condominium does not become worthless at year 47. However, market prices do decline with age in a characteristic pattern.
Market depreciation curves from MLIT data:
| Building Age | Typical Price vs New | Characteristics |
|---|---|---|
| 0–10 years | 100–80% | Highest prices; newest fixtures and standards |
| 10–20 years | 80–60% | Moderate decline; first major renovation cycle approaching |
| 20–30 years | 60–45% | The "sweet spot" for investors — prices have dropped but building has decades of useful life remaining (RC) |
| 30–40 years | 45–30% | Higher yields available but maintenance costs increase; approaching major structural maintenance |
| 40+ years | 30–15% | Lowest prices; highest yields on paper but highest maintenance risk; some approaching end-of-life |
These are generalizations derived from MLIT transaction patterns. Individual properties vary based on maintenance quality, renovation history, management association strength (for condos), and location.
The investor's sweet spot: RC condominiums aged 20–30 years often represent the best risk-adjusted value. The building has depreciated significantly from new, meaning lower entry cost and higher rental yields. But with a 47-year tax life and potentially 60+ years of actual useful life for well-maintained RC structures, significant usable life remains. This is the age range where many experienced Japanese property investors focus their acquisitions.
JRE's Location pages include price-vs-building-age charts that show this depreciation curve for specific areas using actual MLIT data.
Metric 3: Land Ratio
What it is: The proportion of the property's value attributable to land versus the building.
Why it matters: Buildings depreciate to zero; land does not. A property with a high land ratio has a higher "floor value" — the minimum the property would be worth even if the building were demolished.
How it works in practice:
For a new RC condominium in central Tokyo, the land ratio might be 30–40% — most of the value is in the building. For a 40-year-old RC condominium in the same area, the land ratio might be 60–80% — the building has depreciated significantly but the land value remains.
This matters because:
- Higher land ratio = more downside protection — the land value provides a floor
- Older buildings in good locations often have higher land ratios than new buildings, making them less risky than their age might suggest
- For properties near end-of-life, the land ratio approaches 100% — the investment thesis shifts from building use to land value and potential redevelopment
Calculating exact land ratios requires separating the assessed land value from the building value — information available from the property tax notice (固定資産税 通知書) or the tax assessment records at the ward office. Your agent or property manager can obtain this.
Valuation Walkthrough: Step-by-Step
Here is a complete evaluation of a hypothetical (but realistic) listing using all three metrics.
Property: Minato-ku, Tokyo — 20 years old, RC construction, 60m² Asking price: ¥60,000,000 (¥1,000,000/m²)
Step 1: Check the area median
Open the JRE Location page for Minato-ku. The MLIT median for condominium transactions is approximately ¥1,350,000/m² across all ages.
For the 15–25 year age bracket specifically, the median drops to approximately ¥920,000/m² — building age significantly affects the relevant comparison set.
Step 2: Compare the listing
The listing at ¥1,000,000/m² is approximately 9% above the age-adjusted median of ¥920,000/m².
Step 3: Assess the building age position
At 20 years old, this RC building sits in the "sweet spot" zone. It has experienced significant depreciation from new but likely has 25–40+ years of usable life remaining. First major renovation cycle may be approaching, so check the management association's repair reserve and plans.
Step 4: Evaluate the premium
A 9% premium over the median requires justification. Factors that could warrant it:
- Corner unit or high floor — consistently commands 5–15% above median
- Recently renovated interior — a full renovation can add ¥800,000–1,500,000/m² in perceived value
- Direct station access — properties within 3 minutes of a major station trade at a premium
- Premium building reputation — certain tower mansions and brand-name developments carry persistent premiums
If the property has one or more of these features, 9% above median is reasonable. If it's an average mid-floor unit with no renovation and a 7-minute walk to the station, the listing is overpriced relative to transaction data.
Step 5: Frame your offer
If the premium is justified: Offering at or near asking is reasonable. The property is priced within the expected range for its features.
If the premium is not justified: An offer at the age-adjusted median (¥920,000/m² × 60m² = ¥55,200,000) provides a data-backed starting point. This represents an 8% reduction from asking.
→ Negotiation strategies: How to Negotiate Property Prices in Japan
Common Valuation Mistakes
Foreign buyers consistently make the same evaluation errors. Recognizing them upfront saves money.
Judging by total price alone
A ¥30,000,000 property is not automatically "affordable" or "good value." If it's 25m², the ¥/m² is ¥1,200,000 — potentially overpriced for many areas. Always convert to ¥/m² before evaluating.
Ignoring building age
A 10-year-old and a 30-year-old property in the same area should not be evaluated against the same benchmark. The 30-year-old should trade at a significant discount to the 10-year-old. If it doesn't, something is wrong with the pricing or something exceptional justifies the exception (major renovation, premium location within the area).
Forgetting ongoing costs
Two properties at the same ¥/m² can have vastly different total costs of ownership. Monthly management fees (管理費) range from ¥10,000 to ¥40,000+. Monthly repair reserve contributions (修繕積立金) range from ¥5,000 to ¥30,000+. A property with low ¥/m² but ¥50,000/month in fees may cost more over time than a higher ¥/m² property with ¥20,000/month in fees.
→ Japan Property Ownership Costs: Monthly & Annual Breakdown
Currency illusion
When ¥60,000,000 translates to ~$400,000 at a favorable exchange rate, it "feels" cheap compared to property in San Francisco, Sydney, or Singapore. This emotional response is dangerous. The question is not whether the property is cheap in your home currency — it's whether it's fairly priced in yen relative to what other buyers have paid for comparable properties. MLIT data answers that question; exchange rates do not.
Overlooking micro-location within an area
"Minato-ku" is not a single market. A property next to Roppongi Hills trades at a fundamentally different level than a property near a warehouse district in the same ward. Even within a single Location page's data, properties vary by proximity to stations, commercial areas, parks, and infrastructure. The median is a starting point, not a verdict.
Using JRE Location Pages for Valuation
JRE's Location pages are designed to provide the data needed for this valuation process:
- Median ¥/m² from MLIT transaction records — the core benchmark
- Price vs building age charts — showing how value changes with age in each area
- Transaction volume — indicating data reliability (more transactions = more reliable median)
- Historical price trends — showing whether the area is appreciating, stable, or declining
The process for any property:
- Find the listing's ¥/m² (price ÷ floor area)
- Open the relevant Location page on JRE
- Find the MLIT median for the property's age range
- Calculate the gap
- Assess whether property-specific features justify a premium or suggest a discount
Check valuation data for your target area:
- Tokyo — Shinjuku
- Tokyo — Minato
- Tokyo — Roppongi / Azabu
- Osaka — Namba
- Fukuoka — Tenjin
- All Locations →
Frequently Asked Questions
What is a good price per square meter in Tokyo?
It depends entirely on the area and building age. For reference: central Tokyo condominium medians (from MLIT data) range from approximately ¥800,000/m² in outer wards to ¥2,000,000+/m² in premium central areas like Roppongi-Azabu. A "good" price is one at or below the MLIT median for the specific area and age bracket — not an absolute number.
How much does building age affect price?
Significantly. As a rough guide from MLIT data, RC condominiums lose approximately 20–40% of their new-build value by year 20, and 50–70% by year 35. However, well-maintained buildings in prime locations depreciate less, and renovated units within older buildings can recapture significant value. The depreciation is not linear — it tends to be steepest in the first 15 years.
Should I buy new or used property in Japan?
Both can be good investments, but for different reasons. New construction offers modern fixtures, earthquake standards, and warranty coverage — but at premium pricing with limited negotiation room. Used property (especially 15–30 year RC) offers lower entry prices, higher yields, and greater negotiation flexibility. Most experienced investors in Japan focus on the used market for yield-oriented investments.
→ New vs Used Property in Japan
How do I find the land ratio of a property?
The property tax notice (固定資産税 納税通知書) separates the assessed value into land and building components. For properties you're evaluating (not yet owned), your agent can request this information from the seller or obtain it from the tax assessment records (固定資産課税台帳) at the relevant ward office. Some listing details include this breakdown, but it's not standard.
Can MLIT data be used for commercial property valuation?
Yes. MLIT transaction data includes commercial property transactions. However, commercial property valuation typically emphasizes income-based approaches (cap rate, net operating income) more than comparable-sales approaches. MLIT ¥/m² data provides a useful cross-check, but commercial valuation is a more specialized discipline.
What role does renovation play in valuation?
A full-unit renovation (フルリフォーム or フルリノベーション) can significantly increase a property's value — often by 15–30% for older units. However, the cost of renovation should be weighed against the value increase. A ¥3,000,000 renovation that adds ¥5,000,000 in value is worthwhile; a ¥3,000,000 renovation that adds ¥2,000,000 is not. Unrenovated older units can represent opportunities if the renovation economics work.
Next Steps
- Check the asking-sold gap → Asking Price vs Actual Sold Price: The 10–20% Gap
- Negotiate your offer → How to Negotiate Property Prices in Japan
- Complete due diligence → Due Diligence Checklist: 15 Items
- Understand investment metrics → Japan Real Estate Investment Metrics: Cap Rate & Yield Guide
- Check your area → All Location Data →
Disclaimer
This article provides general guidance on evaluating Japanese property values. It is not a substitute for professional appraisal or financial advice. Property valuation depends on numerous factors not fully captured in area-level statistics, including specific location within an area, property condition, management quality, and market timing. Always conduct thorough due diligence and consult with qualified professionals before making purchase decisions.