Full-term and fixed-period fixed rates, who they suit, and what "fixed" does and does not remove.
A fixed-rate mortgage locks the rate for the whole term (like Flat 35) or an initial period, costing more now for payment certainty later — but it removes interest-rate risk only, not income, property, or life risk.
A fixed-rate mortgage (固定金利) locks the rate either for the whole term or for an initial period. Full-term fixed loans — most prominently Flat 35 — hold the same rate for 21–35 years (or longer), so the payment never changes. The trade-off is that the initial rate is higher than a promotional variable rate: you pay more now in exchange for removing the risk of future increases. This certainty is valuable precisely for households that could not comfortably absorb a rate rise.
A fixed rate removes specified interest-rate risk — but it is not "risk-free." It does not protect against a loss of income, a fall in property value, inflation eroding your real position, or life events like illness or divorce, and if market rates later fall you keep paying the higher fixed rate unless you refinance (which has its own costs and health screening). Choose fixed for certainty and an eligible property; choose a lower-cost variable or fixed-period loan only if you are a strong applicant who can genuinely absorb rate increases.
Key points to carry away: Full-term fixed (e.g. Flat 35) locks the rate for the entire loan; It costs more now than a promotional variable rate, buying payment certainty; Fixed removes interest-rate risk, not income, property, inflation, or life risk; Best for borrowers who value certainty and cannot absorb a large rate rise. 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.
Fixed-rate mortgage · Japan Housing Finance Agency
A long-term fixed-rate mortgage program backed by the Japan Housing Finance Agency, offered via partner lenders and often accessible without permanent residency.
Fees: Rate and fees vary by lender and loan-to-value — verify current terms.
A rate fixed for a defined period or the entire loan.
No. It removes specified interest-rate risk, not income, property, inflation, or life risk.
There is no universal answer. Floating rates (変動) have been lower and reduce early payments but can rise, increasing your payment later. Fixed rates (固定, including Flat 35) cost more now but lock certainty for the term, protecting you if rates rise. Choose based on how much payment-increase risk you can absorb: if a rate rise would strain your budget, the certainty of fixed can be worth the premium. Model both before deciding.