Japan Property Capital Gains Tax for Korean Residents — Pre-Sale Checklist

※ This article is for informational purposes and personal analysis only—not investment, legal, tax, or immigration advice, and not a recommendation to buy or sell any property or financial product. Verify figures, rules, and market data against official sources and consult qualified professionals; you are solely responsible for your decisions. Information reflects the time of writing and may change afterward.

Many investors carefully calculate acquisition and holding taxes when purchasing Japanese real estate, but the tax implications at the time of sale are often reviewed much later.

For Korean residents selling property in Japan, both Japanese and Korean tax laws may apply simultaneously. Waiting until just before signing the sales contract can leave too little time to prepare.

This article summarizes the key tax procedures and practical checkpoints Korean residents should review before selling Japanese real estate.

At a Glance

Korean Resident
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Japanese Property Sale
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① Confirm Japanese withholding tax requirements
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② File Japanese tax return
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③ Report capital gains in Korea
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④ Claim Foreign Tax Credit

1. Japanese Individual Capital Gains Tax: Holding Period Rules for Short-Term and Long-Term Capital Gains

Under Japanese tax law, capital gains from individual real estate transfers are subject to classified taxation (分離課税), meaning they are calculated and taxed independently from other income. The primary factor in determining the tax rate is the holding period.

Tax rates differ significantly depending on whether the property is held for 5 years or less (short-term) or more than 5 years (long-term). Simply calculating the calendar period between the acquisition date and the sale date can lead to costly tax mistakes.

The “January 1 Rule”

According to National Tax Agency (NTA) regulations, the holding period is evaluated as of January 1 of the year in which the sale occurs, rather than the actual transaction date. ¹

In practice, think of it as calculating the holding period as of January 1 of the sale year.

For example, if a property purchased on May 1, 2021 is sold on June 1, 2026, the calendar holding period exceeds five years. However, as of January 1, 2026, the holding period is still approximately four years and eight months — meaning only four January 1sts have passed (2022, 2023, 2024, 2025) since acquisition. Therefore, this transaction is treated as a Short-term Capital Gain.

GSF Note

A more common mistake than applying the wrong tax rate is miscalculating the holding period.

In Japan, the threshold is not simply five years from the acquisition date — it is determined based on January 1 of the year of sale.

Even a small adjustment to the sale schedule may change the applicable tax rate, so the transaction timeline should be reviewed together with the overall tax plan.

Applicable Tax Rates for Non-Residents

Non-residents who do not have registered addresses in Japan are exempt from local inhabitant tax, leaving only the national income tax rates:

• Short-term Capital Gains (5 years or less as of Jan 1): Tax rate of 30.63% applies ²
• Long-term Capital Gains (exceeding 5 years as of Jan 1): Tax rate of 15.315% applies ³

Because even a small difference in timing can significantly affect the applicable tax rate, the sale schedule should be considered as part of the overall tax planning process.

2. Withholding Tax at Sale and Settlement via a Tax Representative

Japanese tax law requires withholding tax at settlement to reduce the risk of tax collection becoming difficult after a non-resident seller receives the sale proceeds.

Withholding Tax on Land and Building Transfers

In principle, the buyer is required to withhold 10.21% of the gross purchase price (not the net gain) when paying a non-resident seller. ⁴ This applies to the transfer of land and buildings (土地等の譲渡対価). Condominiums with land rights are generally included. Since a significant portion of the sale proceeds is withheld at closing, sellers need to prepare for this temporary cash-flow restriction on closing day.

Three Criteria for Withholding Tax Exemption

The withholding tax obligation is waived if the transaction meets all three of the following conditions: ⁴

1. The buyer is an individual (not a corporation).
2. The buyer or their relatives use the property as their primary residence.
3. The total sale price is 100,000,000 JPY or less.

If the property is sold to a corporation or an investor who does not plan to reside there, the 10.21% withholding tax will apply.

Appointing a Tax Representative for the Tax Refund

The 10.21% withheld at closing is not the final tax amount. Non-resident sellers must file a Japanese income tax return (確定申告) between February 16 and March 15 of the year following the sale. ⁵

By deducting the acquisition cost, capital improvements, and transaction expenses, the actual tax liability is calculated. If the withheld tax exceeds the actual tax due, the difference is refunded. Non-residents must appoint a local Tax Representative (納税管理人) to file the return and process the refund on their behalf. ⁶

3. Key Differences for Corporate Ownership

If a property is owned under a corporate structure rather than individually, the tax rules at the exit phase are completely different.

Corporate entities do not have holding period distinctions (short-term vs. long-term). Property capital gains are consolidated with the corporation’s other business profits and rental income, and taxed at the standard corporate tax rates. For short-term exits or managing multiple properties, the choice of entity has a significant impact on net proceeds. For details, see the guide on Japanese Property Corporate vs. Individual Post-Tax Yield Comparison.

4. Korean Tax Obligations and the Foreign Tax Credit

Under South Korean tax law, residents are required to report and pay capital gains tax to the National Tax Service (NTS) when selling foreign real estate. ⁷

Reporting Schedule and Tax Rates in Korea

• Preliminary Return: The taxpayer needs to file a preliminary return and pay the tax within 2 months from the end of the month in which the transfer date falls. ⁷ Generally, if the taxpayer has only one foreign property transfer and files a preliminary return, the final consolidated return in May of the following year is waived. ⁷
• Tax Rate: The tax is calculated using the same progressive tax rates applied to domestic real estate.

Eliminating Double Taxation: The Foreign Tax Credit

To prevent double taxation on the same gain, South Korean tax law provides a Foreign Tax Credit (외국납부세액공제). ⁸ The tax paid in Japan can be credited against the Korean tax liability.

[!WARNING] Limits of the Foreign Tax Credit The foreign tax credit is capped at the portion of the Korean tax liability corresponding to the foreign-source income. If the tax paid in Japan exceeds this limit or if certain expenses are not recognized under Korean tax law, the excess amount cannot be credited, resulting in residual double taxation. A pre-sale cross-border tax simulation is recommended.

GSF Note

When both Japan and Korea require separate filings, the order of reporting can matter as much as the tax amounts themselves.

Since the Japanese return must typically be completed before the Foreign Tax Credit can be claimed in Korea, planning the filing timeline in advance is the safer approach.

Furthermore, exit tax matters are linked to inheritance and gift tax planning. To understand the basics of cross-border asset transfers, refer to the Korea-Japan Inheritance and Gift Tax Cross-Border Guide.

5. Pre-Sale Tax & Administrative Checklist

A step-by-step checklist from contract signing through Korean tax filing.

Pre-Contract

• Verify Holding Period: Confirm whether January 1 of the sale year crosses the 5-year threshold — prevents short-term tax rate application
• Check Withholding Tax Applicability: Determine if the 10.21% withholding applies based on the buyer’s profile (corporation or investor individual)
• Estimate Net Proceeds: Calculate after-tax proceeds using acquisition cost, capital expenditures, and transaction fees. Refer to the Rental Yield vs. Capital Gain Breakeven Guide
• Prepare Required Documents: Gather acquisition contract, capital expenditure receipts, and identify tax representative candidates

Closing Day

• Final Withholding Tax Confirmation: Reconfirm buyer eligibility before settlement
• Verify Actual Transfer Amount: Compare actual proceeds received against estimate after 10.21% deduction
• Retain All Settlement Documents: Keep digital copies of all closing-related contracts and receipts

Japanese Tax Return (Year Following Sale, Feb–Mar)

• Appoint and Register Tax Representative: File the representative notification in advance — required for non-residents
• Compile Deductible Expenses: Submit acquisition cost, capital expenditures, and agency fee documentation in full
• File Tax Return and Confirm Refund: Submit return, confirm over-withheld refund amount
• Confirm Refund Receipt: Ensure bank account is set up for refund deposit

Korean Tax Reporting (Within 2 Months from the End of the Month of Sale)

• File Preliminary Return and Pay Tax: Submit to the competent tax office
• Claim Foreign Tax Credit: Attach Japanese final tax payment receipt and file for double taxation relief
• Retain All Documents Permanently: Archive contracts, tax receipts, and remittance records from both countries in a single location

6. Investment Checkpoints

Review the Sale Timeline First

If a property is near the 5-year threshold, adjusting the contract date by a few weeks can significantly change the applicable tax rate. Rather than relying on a simple calendar count, running a simulation with a tax advisor based on the January 1 rule is the safer approach.

Calculate the Actual Cash Flow at Closing First

If withholding tax applies, the actual amount received at closing may be substantially lower than expected. Since any refund is processed after the tax return is filed the following year, short-term liquidity should be factored into the plan as well.

Cross-Border Tax Review Before Signing Is the Prudent Approach

The actual tax liability can vary depending on acquisition cost, deductible expenses, ownership structure, and how the Foreign Tax Credit is applied. Consulting a specialist who handles both Japanese and Korean cross-border tax matters before signing is the recommended approach.

GSF-Ark treats Japanese real estate investment as more than a calculation of rental yields or resale profits. From acquisition and ownership to sale and inheritance, Japanese real estate is part of a long-term asset management process.

This article summarizes the key regulations and procedures Korean residents should be aware of when selling Japanese real estate.

The actual tax liability may vary depending on acquisition cost, deductible expenses, capital expenditures, ownership structure, and how Korean tax law is applied.

Before completing a transaction, reviewing your individual situation with a cross-border tax professional in both Japan and Korea is the recommended approach.

Data Reference Point

• The tax treatments and cross-border guidance in this article are current as of July 4, 2026, based on active tax codes and guidelines from the NTA and NTS. Individual tax requirements may differ due to treaty revisions or legislative changes. Tax laws may change over time. Before completing an actual transaction, always confirm the latest regulations and seek professional advice where appropriate.