The fourth and final installment of Minato City’s 2026 property tax year arrives on March 2, 2027. For owners of residential land in Azabu, Hiroo, or Shirokane, this deadline marks the close of a fiscal year in which strategic timing of purchase and registration could have reduced assessed liability by up to 83.3%. The mechanics of Tokyo’s 23-ward tax system reward precision. Misunderstand the January 1 ownership rule, or fail to secure residential land exemptions, and annual carrying costs on a ¥500 million property can swing by more than ¥4 million.

The Two Taxes and Their Base Rates

Tokyo’s 23 wards, including Minato City, levy two distinct taxes on real property: fixed asset tax (固定資産税, kotei-shisan-zei) and city planning tax (都市計画税, toshi-keikaku-zei). The former applies to all land and structures; the latter applies only to properties within urbanization promotion areas, which covers virtually all of Minato’s residential districts.

The statutory rates are 1.4% for fixed asset tax and 0.3% for city planning tax. These apply to the assessed value (課税標準額, kazei-hyojun-gaku), not market price. The Tokyo Metropolitan Government’s Property Tax Division reassesses values every three years; 2024 (Reiwa 6) was the base year, meaning 2025 and 2026 assessments generally remain frozen unless new construction, subdivision, or significant renovation has occurred.

For a ¥300 million condominium in Park Court Hamarikyu The Tower, this would imply base taxes of ¥4.2 million (fixed asset) and ¥900,000 (city planning) annually. Without exemptions, that is. With proper structuring, the actual burden often falls to one-sixth of these figures.

Residential Land Exemptions: Small-Scale vs. General

The residential land special exemption (住宅用地特例措置, jutaku-yochi-tokurei-sochi) creates the most significant tax reduction available to individual owners. The system divides residential land into two categories with different reduction rates.

Small-scale residential land (小規模住宅用地, shokibo-jutaku-yochi) covers up to 200 square meters per dwelling unit. For this portion, fixed asset tax is calculated on one-sixth of assessed value; city planning tax on one-third. A temporary additional reduction for city planning tax in the 23 wards, effective through 2026, brings this to one-sixth as well. General residential land (一般住宅用地, ippan-jutaku-yochi) applies to the portion exceeding 200 square meters. Fixed asset tax uses one-third of assessed value; city planning tax uses two-thirds.

Consider a 250-square-meter site in Nishi-Azabu with an assessed value of ¥600 million. The first 200 square meters, classified as small-scale, generates fixed asset tax of ¥1.4 million (¥600m × 200/250 × 1/6 × 1.4%) rather than ¥6.72 million. The remaining 50 square meters, general residential, adds ¥560,000 (¥600m × 50/250 × 1/3 × 1.4%). Total fixed asset tax: ¥1.96 million. Without exemptions: ¥8.4 million. The annual savings exceed ¥6.4 million.

The New Housing Reduction and Its 120-Square-Meter Cap

For buyers of newly constructed residences, an additional reduction applies. The new housing tax reduction (新築住宅減額, shinchiku-jutaku-gengaku) provides 50% off fixed asset tax for three years, extending to five years for certified long-term excellent housing (長期優良住宅, choki-yuryo-jutaku). For buildings of three or more stories with fire-resistant construction, these periods extend to five and seven years respectively.

The critical constraint is floor area: the reduction applies only to the first 120 square meters of each dwelling unit. A 180-square-meter penthouse in The Center Tokyo receives the 50% reduction on 120 square meters, with the remaining 60 square meters taxed at full assessed value.

This reduction operates independently of residential land exemptions. A buyer can stack the 50% new housing reduction on top of the 1/6 land exemption, though the former applies to the building assessment while the latter applies to land. For a ¥200 million building on ¥400 million land, the combined effect in years one through three can reduce total tax burden by 60% or more compared to unexempted rates.

The January 1 Rule and Transaction Timing

Japanese property tax law assigns liability to the owner as of January 1 each year. This creates a discontinuity that purchase contracts must address explicitly.

If you complete acquisition on December 15, 2026, you assume liability for the entire 2026 tax year, with four installments due June, September, December 2026, and March 2027. If you complete acquisition on January 5, 2027, the seller retains 2026 liability; your obligations begin with the 2027 tax year.

This is not a statutory allocation. The standard 重要事項説明 (juuyou-jikou-setsumei, the statutory pre-contract disclosure meeting) will disclose outstanding tax obligations, but proration between buyer and seller for mid-year transactions requires explicit contractual negotiation. Most transactions use day-count proration, yet the absence of a statutory default means ambiguity benefits the party with superior documentation.

For foreign buyers structuring acquisitions through December, the practical implication is clear: accelerate closing to capture 2026 exemptions only if the seller’s proration terms are favorable. Otherwise, a January 2027 closing eliminates 2026 liability entirely.

2026 Payment Schedule and Methods

The 2026 tax year for Minato City follows the standard 23-ward quarterly schedule:

Installment	Due Date
1st period	End of June 2026
2nd period	End of September 2026
3rd period	End of December 2026
4th period	March 2, 2027

The fourth period deadline of March 2, 2027 reflects a weekend adjustment from the usual February 28. Late payment incurs penalty interest at 2.4% annually for the first month, rising to 8.7% thereafter.

Payment methods include bank transfer (口座振替, koza-furikae), smartphone payment applications, and credit card. The latter offers convenience and potential point benefits, though processing fees of 1.5% to 2.2% typically exceed reward values for large tax bills. For a ¥3 million annual tax obligation, bank transfer remains the rational choice.

Minato City’s Tax Division (税務課課税係) can be reached at 03-3578-2593 for payment inquiries. English support is limited; complex questions regarding exemption eligibility or assessment appeals generally require Japanese-language correspondence or proxy representation.

Vacant House Risk and Exemption Loss

Properties designated as specified vacant houses (特定空家, tokutei-akiya) forfeit all residential land exemptions. The assessment basis reverts to full value, increasing fixed asset tax alone by sixfold on the small-scale residential portion.

The Vacant House Special Measures Act (空家等対策の推進に関する特別措置法) empowers municipalities to designate properties meeting three criteria: unoccupied, deteriorating, and posing neighborhood risk. Minato City has intensified enforcement since 2024, with 847 designations citywide as of March 2026. Owners receive corrective orders; failure to comply triggers compulsory administrative execution and public disclosure of the property address.

For foreign owners of investment properties or pieds-à-terre, the practical safeguard is regular occupation or documented rental activity. A property occupied fewer than 30 days annually, with visible exterior neglect, presents elevated designation risk. The tax consequence, a sixfold increase in fixed asset tax, typically exceeds ¥3 million annually for premium Minato addresses.

Filing Requirements for Non-Resident Owners

Foreign owners without Japanese permanent residency (永住権, eijuuken) face additional compliance layers. While fixed asset tax and city planning tax generate automatic bills based on registry records, income tax obligations from rental revenue require active filing.

The 2026 filing deadline for 2025 income is March 16, 2026. Non-residents with rental income must submit a final tax return (確定申告, kakutei-shinkoku) or appoint a tax agent (納税管理人, nozei-kanri-nin) to receive documents and handle payment. The agent must be resident in Japan; property management companies frequently provide this service for 5% to 10% of collected rent.

For properties held purely for personal use, no income tax filing is required. However, exit taxation on unrealized gains may apply to owners departing Japan after extended residence, a consideration for those transitioning from resident to non-resident status.

Koukyuu is a private buyer’s advisory for distinguished Tokyo residences in Minato-ku, Shibuya-ku, and Chiyoda-ku, focused exclusively on transactions of ¥300 million and above. A licensed 宅建士 (takken-shi, Japan’s licensed real-estate transaction specialist) personally handles every stage of the engagement, from the first consultation to the signing, a continuity most Tokyo agencies do not offer. book a private consultation)