How Personal Loans Work in Japan
Most unsecured loans in Japan — whether a bank card loan (カードローン) or a loan from a licensed consumer lender (消費者金融) — are repaid in equal monthly instalments (元利均等返済): each payment covers that month's interest plus a slice of principal, so the balance falls every month until it reaches zero in the final one. That is exactly what this calculator models. Interest is typically calculated on the daily outstanding balance, so paying early or overpaying reduces interest faster than the schedule implies — many lenders apply extra payments with no penalty, but confirm yours.
With the example inputs — ¥1,000,000 at the illustrative 8.00% rate over 3 years — the instalment is about ¥31,300 a month and total interest is roughly ¥128,000. Stretch the same loan to 5 years and the instalment drops to about ¥20,300, but interest climbs to roughly ¥216,000: the term does more damage to the total cost than most borrowers expect. Change the rate to the one your lender actually quotes and every figure updates instantly, including the schedule below.
Bank card loans versus consumer lenders
Bank card loans are revolving credit lines: you borrow up to an approved ceiling, at rates that vary with your credit standing, repaying a minimum each month. Consumer lenders (licensed under the Money Lending Business Act) grant smaller unsecured loans, often faster, at higher rates. Purpose-specific loans — for a car, education, wedding, or housing renovation — usually sit at the cheapest end because the use of funds is documented. Japanese is full of these distinctions, but the arithmetic on this page is the same for all of them.
Legal interest caps
The Interest Restriction Act caps interest by loan size: 20% per year below ¥100,000, 18% between ¥100,000 and ¥1,000,000, and 15% from ¥1,000,000 up. Amounts charged above the cap are not enforceable. Separately, the Money Lending Business Act's total quantity rule (総量規則) stops licensed money lenders from lending you unsecured credit that takes your total unsecured borrowing above one third of your annual income — bank loans and mortgages sit outside that rule, but banks run their own affordability screens. The calculator shows the cap that applies at your loan size next to the rate box.
What the calculator leaves out
Guarantor requirements, arrangement fees, late-payment charges (損害金) and credit-life type insurance add-ons are not modelled, because they vary completely by lender and product. If a quote includes an upfront fee, add it to the total repayment mentally, or shorten the amount you borrow to compensate. The safest comparison between two offers is total repayment at the same term — not the headline rate and not the monthly instalment.
Frequently Asked Questions
What rate should I enter?
Enter the annual rate (年率) your lender quotes for your specific loan. The 8.00% pre-filled is an illustrative example only — NOT a current Japanese market rate. Finance Atlas never pre-fills a market rate. The Interest Restriction Act cap for a ¥1,000,000-plus loan is 15% p.a.; for smaller amounts it is 18–20%.
Does the calculator include the one-third-of-income rule?
No — this page computes the repayment schedule only. The Money Lending Business Act caps unsecured borrowing from licensed money lenders at one third of your annual income; bank loans sit outside the rule. For a borrowing-capacity estimate, use the Japan Loan Affordability Calculator.
Can I repay early?
Usually yes. Japanese lenders typically recalculate interest on the daily balance, so early or extra payments reduce total interest. Some products carry conditions, so confirm before assuming — and never pay an upfront 'arrangement fee' to a broker for the privilege.
What is the difference between a card loan and a personal loan?
A card loan (カードローン) is a reusable credit line with a monthly minimum repayment; a purpose-specific personal loan pays out once and amortises in fixed instalments. Fixed instalments clear the debt on schedule; revolving minimums are designed to keep the balance alive. This calculator models the fixed-instalment structure.
Are these figures in Japanese yen?
Yes — every amount is in Japanese yen (JPY, ¥), rounded to whole yen because JPY has no practical minor unit. Large results also show the 万 (man) notation used in Japanese listings, where 100万 = ¥1,000,000.
Related Japan Calculators & Guides
- Japan Loan Affordability Calculator — how much you could safely borrow
- Japan Credit Card & Installment Calculator — the cost of card borrowing
- Guide: Understanding Loan Interest in Japan
- Guide: How Loan Repayments Work in Japan
Disclaimer: Finance Atlas is not a licensed bank, lender, card issuer or financial adviser in Japan. This calculator provides educational estimates only and does not constitute financial advice or a credit offer. Confirm exact figures with your lender, issuer or bank.