About

Site	Japan Mortgage Rate Rise Simulator
Operator	Jitty
What it does	Free tools to estimate the effect of rate rises and refinancing on a Japanese mortgage
Contact	(coming soon)

How it is calculated

Calculations use the standard equal-payment formula (payment = principal × monthly rate ÷ (1 − (1 + monthly rate)^−months)). The site does not forecast future rates; it uses the values you enter.

References

• Bank of Japan monetary policy meeting releases (policy rate)
• Lenders' mortgage product descriptions (5-year and 125% rules)