Prefecture
Employee health insurance rates can vary by region and insurer, so location matters.
Japan health insurance calculator for social insurance planning
Estimate monthly health insurance and related social insurance costs from salary, prefecture, age, employment type, dependents, and bonus. Useful for Japan offer comparison, age 40 planning, and freelancer versus employee budgeting.
What affects Japan health insurance cost
Age
Long-term care insurance starts for many workers from age 40 and changes monthly deductions.
Employment type
Company employee, part-time, freelancer, and student assumptions differ.
Bonus
Annual bonus can affect social-insurance burden and annual take-home planning.
Use with salary planning
- Run the salary calculator first, then compare the health insurance line item separately.
- Check age 40+ scenarios if you are close to the long-term care premium threshold.
- Confirm final rates with your insurer, employer, municipality, or official notices.