Mortgage refinancing in Japan
When refinancing pays, the full cost stack, health screening, and term-extension traps.
Refinancing replaces your mortgage with a new one, usually from another lender; it pays only when the discounted present-value interest saving exceeds the new origination fee, registration, judicial-scrivener, appraisal, and insurance costs.
Key points
- Compare remaining interest savings against all new costs, not just the rate drop.
- New costs include origination fee, mortgage cancellation and registration, judicial-scrivener, and appraisal.
- Refinancing usually requires fresh group credit life insurance and health screening.
- Extending the term can hide a higher total cost even at a lower rate.
When refinancing pays
Refinancing (借り換え) replaces an existing mortgage with a new one, often from another lender. It makes sense only when the present-value interest savings and any risk improvement exceed all the new costs. Compare the remaining interest you would save against the new origination fee, the mortgage cancellation and new registration, judicial-scrivener costs, appraisal, insurance differences, and any early-redemption charge on the old loan. A rate drop that looks large can be erased by fees, especially on a loan with only a few years left or a small remaining balance.
Health screening and term extension
Refinancing usually requires new group credit life insurance, so it involves a fresh health screening — poor health can restrict standard insurance, though wider-acceptance products may exist. Obtaining permanent residence can broaden the lenders available to you, but approval is never guaranteed. Beware term extension: stretching the loan back out lowers the monthly payment and can make a refinance look attractive while actually raising total interest. Compare like-for-like remaining terms, and treat a lower monthly payment achieved by re-lengthening the loan as a cost, not a saving.
Key points to carry away: Compare remaining interest savings against all new costs, not just the rate drop; New costs include origination fee, mortgage cancellation and registration, judicial-scrivener, and appraisal; Refinancing usually requires fresh group credit life insurance and health screening; Extending the term can hide a higher total cost even at a lower rate. Use the linked guides and calculators for the full decision, and confirm anything material with the lender, a licensed broker, a judicial scrivener, or a tax accountant before you act.
Who this is for
- Owners with a high rate and long remaining term
- Borrowers whose PR or credit has improved
What this is not
- Loans with a small balance or short remaining term
- A lower monthly payment from a longer term is not a saving; compare total present-value cost.
Frequently asked questions
What is refinancing?
Replacing the old mortgage with a new mortgage, often from another lender.
When does refinancing make sense?
When discounted present-value savings and risk improvement exceed all new costs.
Does refinancing require health screening?
Usually, for new group credit life insurance; poor health can restrict standard cover.
Can I extend the term when refinancing?
Sometimes, but extending can increase total interest — a lower monthly payment is not a saving.