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Insurance Optimizer

The Wealth Hack. Stop paying "Foreigner Tax" (Agency Commissions). Switch to Direct.

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Frequently Asked Questions

National Health Insurance (kokumin kenko hoken / NHI) covers self-employed people, students, unemployed individuals, and workers at companies that do not offer shakai hoken. Shakai hoken is employer-sponsored insurance where your employer pays approximately half of the premium on your behalf, making your out-of-pocket cost much lower than NHI for equivalent coverage. Both systems cover 70% of medical costs, but shakai hoken includes additional benefits such as income replacement during extended sick leave.
Japan's public health insurance already covers 70% of most medical costs, making private supplemental insurance most valuable in specific scenarios: covering private hospital room fees, providing income replacement during extended hospitalization, covering advanced cancer treatments that exceed public coverage, or bridging gaps when changing jobs and temporarily uninsured. Private health insurance is particularly recommended for foreigners with dependents or those in higher-risk occupations in Japan.
For shakai hoken, dependent family members including a non-working spouse and children are covered free of additional charge as long as the dependent's annual income is below ¥1.3 million and you are providing more than 50% of their living expenses. For National Health Insurance, coverage works differently — each household member is insured separately and premiums are calculated based on the combined previous year income of all household members, with each person adding to the total premium.
Cancer insurance in Japan pays a lump-sum benefit upon cancer diagnosis (typically ¥500,000 to ¥2 million) plus a daily hospitalization benefit and often covers chemotherapy, radiation, and immunotherapy costs specifically. Even with Japan's 70% public health insurance coverage, advanced cancer treatments can generate significant out-of-pocket costs, lost income during treatment, and non-medical expenses. Premiums start around ¥2,000 per month, making cancer insurance a cost-effective addition to your Japan insurance portfolio especially after age 40.
The switch between insurance types in Japan happens automatically based on your employment status changes. When you join a company offering shakai hoken, your employer handles enrollment and you should cancel your NHI enrollment at city hall within 14 days using your new shakai hoken card as proof. When you leave a company and become uninsured, you must enroll in National Health Insurance at city hall within 14 days to avoid gaps in coverage and potential late enrollment penalties.

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