Capital gains tax in Japan

What statutory framework governs Japanese capital-gains taxation?

Japanese capital-gains taxation operates under the Shotokuzeihō (所得税法 — Income Tax Act, Act 33 of 1965) administered by the National Tax Agency (国税庁 — Kokuzeichō, NTA), with substantial supplementary provisions in the Sozeitokubetsusochi-hō (租税特別措置法 — Special Taxation Measures Law, Act 26 of 1957). The framework segregates gains into two principal categories with distinct rate structures: listed-securities gains and real-estate gains. Listed-securities gains face a flat 20.315% combined rate: 15% national income tax plus 5% prefectural and municipal inhabitant tax plus 0.315% special reconstruction surtax (the surtax applies only to the national-tax component at 2.1% × 15% = 0.315%). The flat-rate structure has applied since the 2014 reform that consolidated the prior split-rate framework. Real-estate gains apply a holding-period-based dual rate: 39.63% short-term (30% income tax plus 9% inhabitant tax plus 0.63% surtax) for property held 5 years or less on 1 January of the disposal year, and 20.315% long-term for property held longer than 5 years. PwC's 2026 Japan capital-gain commentary identifies the 5-year cliff as a deliberate long-term-holding incentive aligned with Japanese stable-ownership policy.

How does the new NISA programme work?

The new NISA (NISA 2024 — Nippon Individual Savings Account) effective 1 January 2024 under Article 37-14 of the Sozeitokubetsusochi-hō consolidates the prior General-NISA and Tsumitate-NISA frameworks into a permanent tax-free investment account structure. Annual contribution cap: ¥3.6 million total split between Growth Quota (Seichō Tōshi Waku 成長投資枠) at ¥2.4 million annually and Tsumitate Quota (Tsumitate Tōshi Waku つみたて投資枠) at ¥1.2 million annually. Lifetime balance cap: ¥18 million total (¥12 million Growth quota maximum, ¥6 million Tsumitate quota maximum). Within the NISA framework, all dividend income, interest income, and capital gains face zero personal income tax — a substantial benefit versus the standard 20.315% framework. KPMG's 2026 Japan NISA commentary reports approximately 23 million NISA accounts opened by end-2025, representing widespread retail-investor adoption of the tax-advantaged structure. Practitioners frequently recommend full NISA contribution before any taxable-account investment activity for Japanese-resident individual investors with sufficient cash flow to fund both. The Japanese expat-tax crossover at /global/jurisdictions/country/jp/topic/expat-tax-residency covers cross-border residency frameworks including NISA-eligibility for inbound expats.

How does the real-estate holding-period work?

Japanese real-estate capital-gain taxation under Article 31 and Article 32 of the Sozeitokubetsusochi-hō applies the holding-period cliff measured on 1 January of the disposal year — not the actual disposal date. Short-term holding (5 years or less on 1 January): 39.63% combined rate (30% national income tax plus 9% prefectural and municipal inhabitant tax plus 0.63% special reconstruction surtax). Long-term holding (longer than 5 years on 1 January): 20.315% combined rate (15% income tax plus 5% inhabitant tax plus 0.315% surtax). The 1-January reference date creates a meaningful timing consideration: a property acquired on 1 January 2020 must be held through 1 January 2026 to qualify for the long-term rate on a 2026 disposal. EY's 2026 Japan real-estate commentary identifies the holding-period cliff as the dominant timing consideration for individual real-estate investors — practitioners frequently advise deferring disposals into the long-term-qualifying year. Cost-basis calculation uses indexed acquisition price including registration tax, transfer tax, and certain renovation costs.

What is the Article 35 principal-residence exclusion?

Article 35 of the Sozeitokubetsusochi-hō provides a ¥30 million principal-residence exclusion against real-estate capital-gain liability. Eligibility criteria: (a) the property served as the seller's principal residence at the time of disposal or within three years preceding disposal, (b) the seller has not used the Article 35 exclusion within the three-year period preceding the current disposal (anti-multiple-use rule), (c) the seller and buyer are not related parties under the anti-related-party provisions, (d) the disposal does not benefit from another Sozeitokubetsusochi-hō residential-property relief. The exclusion operates as a deduction from the calculated capital gain — gains up to ¥30 million face zero capital-gain tax, with the excess gain taxed at the standard 20.315% (long-term) or 39.63% (short-term) rate. KPMG's 2026 Japan residence-tax commentary identifies Article 35 as the principal Japanese homeowner relief, particularly valuable in high-real-estate-cost Tokyo, Osaka, and Yokohama markets where typical principal-residence gains can substantially exceed ¥30 million.

How are listed-securities gains administered?

Listed-securities gains administration distinguishes between specific-account holdings and ordinary-account holdings under Article 37-11 of the Sozeitokubetsusochi-hō. Specific-account holdings (tokutei kōza 特定口座) with withholding-at-source election: Japanese brokers withhold the 20.315% combined rate on each realised gain, with the withholding serving as final tax — no further reporting required on the annual kakutei shinkoku. Specific-account holdings without withholding election: gains report on the annual kakutei shinkoku at the 20.315% rate. Ordinary-account holdings (ippan kōza 一般口座): gains calculate via the annual kakutei shinkoku without broker withholding, requiring more detailed substantiation. PwC's 2026 Japan listed-securities commentary notes the specific-account framework substantially reduces compliance burden for retail investors — most Japanese brokers offer specific-account elections by default. The Japanese self-employed crossover at /global/jurisdictions/country/jp/topic/self-employed-tax covers business-asset disposal treatment falling outside the listed-securities framework.

Are non-residents taxed on Japanese-asset capital gains?

Non-residents generally face limited Japanese capital-gains taxation under Section 161 of the Shotokuzeihō. Listed-securities gains: non-residents are generally not subject to Japanese capital-gains on listed-securities disposals where the seller does not maintain a permanent establishment in Japan (subject to the substantial-shareholding anti-avoidance rule for holdings exceeding 25%). Real-estate gains: non-residents are subject to Japanese capital-gains on Japanese-situs real-estate disposals at the standard short-term/long-term rate structure. Treaty interaction matters significantly for non-listed-share dispositions of Japanese real-estate-rich entities — Article 13(4) of OECD Model treaties assigns gains on disposals of substantial shareholdings in real-estate-rich companies to the situs state. The Japanese tax-treaty crossover at /global/jurisdictions/country/jp/topic/tax-treaty-relief covers Japan's 80+ DTA framework and Article 13 implementation across the treaty network.

How do international filers handle cross-border capital-gain reporting?

Japanese residents holding foreign-listed shares or non-Japanese real estate report worldwide gains through the annual kakutei shinkoku due 15 March following the tax year. Foreign-tax credit under Section 95 of the Shotokuzeihō offsets foreign tax paid against Japanese liability up to the Japanese rate on the same income. Where foreign rates exceed the Japanese 20.315% rate (e.g., US 37% federal-plus-state for high-income residents), the excess is lost — no carry-forward exists for unused foreign tax credit. CRS automatic exchange flows foreign-broker data to NTA automatically. Cross-border foreign-currency exchange for cost-effective JPY conversion runs through WorldFirst supporting accurate Japanese personal income tax reporting on USD or EUR-denominated transactions. US-source 1099-B documentation for Japanese-resident accounts feeds the annual filing via Tax1099 reconciliation. Japanese residents with substantial foreign investment holdings face Foreign Asset Disclosure obligations above ¥50 million total value reported separately on Form Kokugai Zaisan Chōsho.

What enforcement framework operates?

NTA enforcement of capital-gains-tax compliance operates under the General Rules of National Taxes Act (Act 66 of 1962). Penalties for non-disclosure: late-filing penalty of 5% to 20% of underpaid tax, with the rate scaling by severity of breach; underreporting penalty of 10% to 15% on amounts above the originally declared figure; interest at the basic discount rate plus 4 percentage points compounded from the original due date. Records retention period is 7 years from the close of the fiscal year (10 years for blue-form filers under Section 148 Shotokuzeihō). Required documentation: broker-issued tax certificates confirming 20.315% withholding for resident clients (Form Tokutei Kōza Nenkan Torihiki Hōkokusho); cross-border investment statements; real-estate disposal certificates; NISA-account statements. Practitioners commonly recommend Japanese certified tax accountants (zeirishi 税理士) registered with the Japan Federation of Certified Public Tax Accountants' Associations for complex cross-border investment structuring including NISA-eligibility analysis, Article 35 principal-residence-exclusion optimisation, foreign-tax-credit calculation, and substantial-shareholding non-resident exposure.