Japan Mortgage Calculator — Monthly Payment & Total Cost
Enter loan amount, interest rate, and term to calculate your monthly payment and total cost. Uses the equal principal+interest (ganri kinto) repayment method.
万円
1万 = 10,000 yen. Enter 3000 for 30 million yen.
%
yrs
Monthly Payment
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Principal: --Interest: --
Show Repayment Schedule
※ Actual repayment amounts may vary by financial institution. Please consult your bank or lender for exact figures.
Frequently Asked Questions
What is the difference between equal principal+interest and equal principal repayment?
Equal principal+interest (ganri kinto) keeps your monthly payment constant throughout the loan. Equal principal (gankin kinto) keeps the principal portion constant, so total monthly payments decrease over time as interest shrinks. This tool calculates using the equal principal+interest method.
What is the monthly payment for a 30 million yen loan over 35 years?
At 1.5% interest with equal principal+interest repayment, the monthly payment is approximately 91,855 yen. The total repayment is about 38,579,007 yen, with roughly 8,579,007 yen in interest.
Which is better: variable or fixed interest rate?
Variable rates start lower but carry the risk of future rate increases. Fixed rates are higher initially but provide payment stability. Neither is universally better — it depends on your financial plan and risk tolerance.
What is the Japan housing loan tax deduction?
The housing loan tax deduction (jutaku loan koujo) allows you to deduct 0.7% of your year-end loan balance from your income tax for up to 13 years. This can significantly reduce your tax burden during the early years of your mortgage.
What is the benefit of making extra repayments?
Extra repayments (kuriage hensai) reduce your principal, which significantly lowers total interest paid. The earlier you make them, the greater the savings. There are two types: term-shortening and payment-reduction.
How to Use the Japan Mortgage Calculator
Enter your loan amount in units of 10,000 yen (man-en), the annual interest rate, and the repayment period in years. Click "Calculate" to see your monthly payment, total repayment, and total interest. Use the preset buttons for common interest rates and loan terms in Japan.
Understanding the Repayment Schedule
Click "Show Repayment Schedule" below the results to see a year-by-year breakdown of principal, interest, and remaining balance. This helps you understand how much of each payment goes toward the principal versus interest over the life of your loan.