On July 1, 2026, Japan's National Tax Agency (NTA) published the 2026 rosenka (路線価) — the official per-square-meter land values it uses to calculate inheritance and gift tax. The national average rose 2.9% year-on-year, the fifth consecutive annual increase and the largest since the current methodology began in 2010. In effect, Japan's tax authority just repriced land across the entire country — and the fastest-rising values are exactly where foreign investors have been buying: the international ski resorts.
If you own — or are buying — property in Japan and have never heard the word "rosenka," this article explains what it is, what the 2026 numbers say, and the one reason it matters specifically to foreign owners that most Japanese-language coverage skips entirely.
What Is Rosenka? Japan's Three Land-Price Systems in Plain English
Rosenka is a per-m² land value set by the National Tax Agency and published every July 1. It covers roughly 310,000+ survey points nationwide, and the valuation date is January 1 of the same year. Its single purpose is to provide the standardized basis for calculating inheritance tax (相続税) and gift tax (贈与税) on land. It is not a market price, and it is not what you pay when you buy.
Japan runs three parallel land-value systems, published by two different ministries for three different purposes. Confusing them is the most common mistake foreign owners make.
| System | Set by | Purpose | Roughly equals |
|---|---|---|---|
| Rosenka (路線価) | National Tax Agency (NTA) | Inheritance & gift tax basis | ~80% of koji-chika |
| Koji-chika (公示地価) | MLIT | Official benchmark / policy reference | ~market benchmark |
| Transaction prices (取引価格) | MLIT records | What buyers actually paid | Actual market |
Rosenka is deliberately set at roughly 80% of the koji-chika benchmark value, giving taxpayers a built-in cushion. Koji-chika is the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) benchmark used for policy and appraisal reference. Actual transaction prices — what buyers really paid in recorded sales — are the numbers JRE tracks for market analysis. For the full 2026 market picture built on MLIT benchmark and transaction data, see our Japan land prices 2026 breakdown; this article does not re-explain that dataset.
The key takeaway: rosenka answers "how much tax will be owed on this land?" — not "what should I pay for it?"
The 2026 Rosenka Numbers
According to the NTA's Reiwa 8 (2026) announcement, the national average rose 2.9%, with 36 of 47 prefectures up, 8 down, and 3 flat. For the first time in 35 years — since 1991 — no prefectural-capital top survey point recorded a decline.
Prefecture and headline highlights (NTA, 2026)
| Metric | 2026 Value | Note |
|---|---|---|
| National average | +2.9% YoY | 5th consecutive rise; largest since 2010 |
| Highest point — Ginza 5-chome, Chuo-dori | ¥53.36M/m² (+11.0%) | No. 1 in Japan for 41 straight years |
| Tokyo prefecture average | +9.4% | National highest; roughly 3× the national average |
| Okinawa average | +6.6% | Tourism-driven |
| Osaka average | +5%+ | Expo and inbound demand |
| Prefectures up / down / flat | 36 / 8 / 3 | Broad-based gains |
Tokyo's +9.4% prefectural average — about three times the national figure — reflects sustained redevelopment and central-ward office and hotel demand. The Ginza 5-chome Chuo-dori point, at ¥53.36M/m² (+11.0%), remains the most valuable in the country for the 41st consecutive year.
Resort top-risers (NTA, 2026)
The fastest-rising rosenka values in the country are not in the big cities — they are in foreign-driven ski resorts.
| Rank | Area | 2026 Rosenka YoY | Note |
|---|---|---|---|
| 1 | Hakuba, Nagano | +32.7% | No. 1 riser for the 3rd straight year |
| 2 | Nozawa Onsen, Nagano | +31.3% | International ski demand |
| 3 | Furano, Hokkaido | +28.0% | "Next Niseko" narrative |
| — | Noto earthquake area, Ishikawa | −8.6% | Still recovering from the quake |
The NTA attributes these gains to record inbound tourism — roughly 42.6 million overseas visitors in 2025 — alongside redevelopment and hotel demand. The same release shows the other side of Japan's two-speed land market: the Noto Peninsula earthquake area remains down 8.6%.
View real transaction prices, price trends, and investment analysis for Niseko / Kutchan based on MLIT government data.
Explore Niseko / Kutchan Data →Why Foreign Owners Should Care: Inheritance Tax on Japan-Located Property
Here is the part most Japanese-language coverage does not frame for an international audience. Japan levies inheritance tax on Japan-located real estate even when the deceased owner and every heir are non-resident foreigners. Location of the asset — not the nationality or residence of the people involved — is what brings Japan-situated real property into the Japanese inheritance-tax net. And rosenka is the number used to value that land for the tax calculation.
In practice, this means a rising rosenka is not just an abstract market signal for a foreign owner — it is a rising tax-valuation base for whatever your heirs may eventually inherit. A Hakuba plot whose rosenka rose 32.7% in a single year is a plot whose inheritance-tax valuation base rose 32.7% in a single year.
This is stated here as fact, not advice. Japan's inheritance-tax rules — basic exclusion amounts, statutory heir calculations, treaty interactions, and filing obligations for non-residents — are genuinely complex and change over time. Before making any decision, consult a licensed Japanese tax professional (税理士) who handles cross-border estates. This article is not tax advice.
Frequently Asked Questions
Does rosenka apply to foreigners who own property in Japan?
Yes. Rosenka is a property-based valuation, not a person-based one. It applies to land located in Japan regardless of the owner's nationality or residence. Because Japan taxes inheritance and gift transfers of Japan-located real estate even when the owner and heirs are all non-resident foreigners, rosenka is the valuation base that determines the taxable value of that land. Confirm your specific situation with a licensed Japanese tax professional (税理士).
Is rosenka the price I should pay for a property?
No. Rosenka is a tax-valuation figure set once a year by the National Tax Agency at roughly 80% of the koji-chika benchmark — it is not a market price and not a negotiation guide. In liquid urban markets it can be a rough sanity check, but in fast-moving resort areas actual prices can run far above it. For a full breakdown of when rosenka is and is not useful as a benchmark, see Rosenka vs Market Price in Japan.
How do I look up the rosenka for my address?
The NTA publishes rosenka on its official 財産評価基準書 (Property Valuation Criteria) portal at rosenka.nta.go.jp. You select the prefecture, then the municipality, then view the road-value map for the specific street. The value shown is in thousands of yen per m². Note that the portal is Japanese-only, with no official English interface, so most foreign owners have a Japanese-speaking professional pull the figure.
When is rosenka published and what date does it value?
The NTA publishes rosenka every July 1. The valuation date is January 1 of the same year, so the figures reflect land values as assessed at the start of the year and are fixed for the full calendar year regardless of how the market moves afterward.
Related Reading
- Japan Land Prices 2026: Official MLIT Data Explained — the market-price and benchmark dataset behind the tax valuations
- Rosenka vs Market Price in Japan: How Foreign Investors Should Actually Use It — why the official tax value can be 10x off in resort markets
- Niseko & Kutchan Land Prices: Government Data — the resort market where rosenka is rising fastest
Data in this article is sourced from Japan's National Tax Agency (国税庁) rosenka publication (令和8年分 路線価), released July 1, 2026, with a January 1, 2026 valuation date. Rosenka is the standardized land value used to calculate inheritance and gift tax; it differs from MLIT's koji-chika benchmark and from actual transaction prices. This article is general information, not tax or investment advice — consult a licensed Japanese tax professional (税理士) for your specific situation.