Refinancing Your Japan Mortgage: When and How to Do It

If you own property in Japan and have an existing mortgage, refinancing could save you significant money over the life of your loan — or help you lock in better terms as interest rates shift. With the Bank of Japan ending its ultra-low rate era and benchmark rates rising to 0.75% (a 30-year high as of late 2024), understanding when and how to refinance has never been more important for foreign homeowners in Japan.

This guide walks you through everything you need to know about refinancing a Japanese mortgage: when it makes sense, which banks will work with foreigners, the step-by-step process, and the real costs involved.

What Is Mortgage Refinancing in Japan?

Mortgage refinancing (借り換え, karikae) in Japan means replacing your existing home loan with a new one — typically from a different lender — to obtain better interest rates, different loan terms, or more favorable repayment conditions.

Unlike a loan modification with your current bank, refinancing in Japan is treated as a completely new loan application. Your new lender pays off your existing mortgage, and you begin repaying the new loan under the agreed-upon terms.

There are two main scenarios where refinancing applies:

• Variable-to-fixed switch: Moving from a variable rate (変動金利) to a fixed rate (固定金利) to lock in predictable payments as rates rise
• Rate reduction: Securing a lower interest rate, often by switching lenders or waiting until a fixed-rate period expires

For foreigners in Japan, refinancing carries the same benefits as for Japanese nationals — but also some additional hurdles related to residency status, documentation, and lender eligibility.

When Should You Consider Refinancing?

Timing is everything with mortgage refinancing. Not every situation calls for it, and the costs can easily outweigh the benefits if you act at the wrong moment.

The Interest Rate Gap Rule

The general rule in Japan is that refinancing makes financial sense when the new interest rate is at least 0.5–1.0% lower than your current rate. A smaller gap may not offset the upfront costs of refinancing (more on those below).

With Japan's rising rate environment in 2026 — variable rates moving from 0.3–0.4% toward 0.6–0.75%, and 10-year fixed rates reaching 2.4–2.8% at some institutions — the calculus for variable-rate borrowers is shifting. If you locked in a fixed rate several years ago at a higher level, refinancing to a variable or mid-term fixed product may now make sense.

Fixed-Rate Period Expiry

Many Japanese mortgages begin with a fixed-rate period of 3, 5, or 10 years. When this introductory period ends, the loan typically converts to a variable rate — which may be higher than current alternatives. This is the most common and natural time to refinance in Japan.

Check your original loan documents for the date your fixed period ends. Ideally, start the refinancing process 3–6 months before that date to have the new loan ready in time.

Significant Change in Financial Circumstances

If your income has grown, you've obtained permanent residency (PR), or your property value has increased, you may now qualify for better loan terms than when you first borrowed. Lenders view PR holders far more favorably — often applying the same standards as Japanese borrowers — which can unlock lower rates and longer repayment periods.

Remaining Loan Balance and Years

Refinancing is generally more beneficial when:

• You have ¥10 million or more remaining on your loan
• There are 10+ years remaining on your repayment period

With a smaller balance or fewer years remaining, the interest savings may not justify the transaction costs.

What Does Refinancing Cost in Japan?

Before proceeding, calculate the total cost of refinancing. These fees are paid upfront and can range from ¥300,000 to ¥700,000 or more, depending on your loan size and lender.

Common Refinancing Costs

Total estimated cost: ¥300,000–¥800,000

Use a break-even calculation: divide your total refinancing costs by your monthly interest savings to find how many months until you recoup the cost. If the break-even point is more than 5–7 years out, reconsider whether refinancing is worthwhile.

Which Banks Offer Refinancing for Foreigners in Japan?

Not all Japanese banks will refinance mortgages held by foreign nationals, particularly those without permanent residency. However, several institutions actively serve foreign customers.

For more detail on initial mortgage options, see our guide to Mortgages and Home Loans for Foreigners in Japan.

Banks That Accept Foreign Refinancing Applications

SMBC Trust Bank PRESTIA One of the most foreigner-friendly major banks. Offers refinancing for non-PR residents with stable income. English language support available. Publishes updated rate sheets monthly.

Shinsei Bank (Aozora Group) — PowerSmart Home Mortgage The PowerSmart product can be used to refinance from another institution. Known for flexibility with foreign residents and online application support.

Suruga Bank Accepts applicants with as little as 1 year of Japan residency and ¥2M+ annual income. Particularly active in the foreign buyer and refinancing market.

Aeon Bank Requires 3+ years of residency. Offers English support and has competitive rates for qualifying applicants.

Tokyo Star Bank Higher income threshold (¥5M+ annually) but accepts non-PR foreign residents with 3+ years residency.

For comprehensive guidance on the foreign mortgage process, check out Living in Nihon's guide to buying property and mortgages in Japan.

Step-by-Step Refinancing Process in Japan

Refinancing in Japan follows a structured process similar to a new mortgage application. Expect it to take 2–3 months from start to finish.

Step 1: Calculate Your Break-Even Point

Before anything else, determine whether refinancing is financially worthwhile. Gather:

• Your current outstanding loan balance
• Your current interest rate and remaining term
• The estimated new interest rate
• Estimated total transaction costs (see table above)

Formula: Break-even months = Total costs ÷ Monthly savings

Step 2: Research and Compare Lenders

Contact 2–3 banks that accept foreign applicants for refinancing. Compare:

• Interest rates (variable vs. fixed)
• Loan origination and processing fees
• Early repayment penalty from your current lender
• English-language support availability

For Work in Japan's housing and living guide also covers practical aspects of managing housing costs as a foreign resident.

Step 3: Pre-Screening (事前審査)

Submit a preliminary application to your chosen lender(s). This informal screening checks your basic eligibility without a hard credit inquiry. You'll need:

• Passport and residence card (both sides)
• Most recent 2–3 years of tax withholding statements (源泉徴収票)
• Recent pay stubs (approximately 3 months)
• Employment certificate (在職証明書)
• Current loan statement showing outstanding balance

Step 4: Formal Application (本審査)

If pre-screening is successful, submit the full application. Additional documents required:

• Property registration certificate (登記事項証明書)
• Building floor plan and land measurement documents
• Earthquake insurance documentation
• Proof of current mortgage payments (bank statements)

The bank will conduct a property appraisal and full income assessment. This stage takes 2–4 weeks.

Step 5: Loan Approval and Signing

Upon approval, you'll sign the new loan agreement. Review it carefully — ideally with a bilingual advisor or translator if Japanese is not your strong suit. Pay attention to:

• Interest rate type and reset schedule
• Early repayment terms for the new loan
• Fee structure

Step 6: Settlement and Discharge

On the settlement date, your new lender pays off your existing mortgage. A judicial scrivener (司法書士) handles the legal transfer — canceling the old mortgage registration and establishing the new one. You'll be present at the settlement, typically at your new lender's branch.

Step 7: Begin Repayment

Your first payment to the new lender typically begins the following month. Keep records of the settlement for tax purposes — you may be able to claim the mortgage interest deduction (住宅ローン控除) on the new loan, subject to eligibility.

Impact of Your Visa and Residency Status on Refinancing

Your immigration status significantly affects your refinancing options. As detailed in our guide to Visa and Residency Considerations for Property Buyers in Japan:

Permanent Residents (PR): Eligible at virtually all Japanese banks under the same conditions as Japanese nationals. Best rates, lowest down payment requirements, widest choice of lenders.

Long-Term Visa Holders (Work, Spousal, etc.): Eligible at foreigner-friendly banks like those listed above. May face higher interest rates or stricter income requirements. Residency duration matters — the longer, the better.

Short-Term or Limited Visa Holders: Refinancing is very difficult. Most lenders require 1–3+ years of residency and stable employment. Focus on extending your visa first.

For foreign homeowners who have recently obtained PR after buying with a work visa, refinancing to take advantage of improved eligibility can yield significant savings. See gaijinbuyhouse.com's mortgage documentation guide for detailed documentation requirements.

Japan's Rising Rate Environment: What It Means for Refinancing

As of early 2026, Japan's interest rate landscape has shifted dramatically. The Bank of Japan raised rates to 0.75% in late 2024 — a level not seen in 30 years — and many economists expect further gradual increases.

For the approximately 80% of Japanese mortgage borrowers on variable rates, this means monthly payments are creeping upward. The variable rate advantage that borrowers enjoyed through most of the 2010s is narrowing.

What this means for refinancing:

• Variable-to-fixed switches are increasingly popular, especially for those who want payment certainty as rates rise
• Short-term fixed products (3–5 years) offer a middle ground: lower than long-term fixed, with less exposure than pure variable
• Existing fixed-rate holders may want to wait and compare before switching, as some long-term fixed rates now exceed the cost of variable options

For the latest rate data, see arealty.jp's 2026 housing loan interest rate trends and tokyoportfolio.com's guide to housing loans for foreigners.

Common Mistakes to Avoid

Not accounting for all costs. The most common error is focusing only on the interest rate difference without calculating total transaction costs. Run the full break-even analysis first.

Refinancing too soon. Most banks want to see 1–3 years of on-time payment history before approving refinancing. Applying too early often results in rejection.

Ignoring the early repayment penalty. Ask your current lender exactly what it will cost to close out your existing loan. Some charge a flat fee; others charge a percentage of the outstanding balance.

Not comparing multiple lenders. Rates and fees vary significantly. Contact at least 2–3 banks before committing.

Forgetting about the mortgage tax deduction. Confirm with a tax advisor whether your new loan qualifies for the住宅ローン控除 (housing loan deduction). Eligibility requirements exist, and refinancing resets the deduction clock.

Summary: Is Refinancing Right for You?

Refinancing your Japan mortgage makes the most sense when:

• Your current fixed-rate period is ending
• You can secure a rate at least 0.5–1.0% lower than your current rate
• You have ¥10M+ remaining on your loan with 10+ years to go
• Your residency status has improved (e.g., recently obtained PR)
• The break-even point on costs is within 5 years

For more context on the broader home buying and financing landscape, see our Complete Guide to Buying Property in Japan as a Foreigner and the dedicated Mortgages and Home Loans for Foreigners in Japan article.

With careful timing, the right lender, and a thorough cost analysis, refinancing can meaningfully reduce your total borrowing costs — and give you greater financial flexibility as Japan's interest rate environment continues to evolve.