Overinsurance and underinsurance
Public-benefit duplication, unnecessary riders, and missing catastrophic cover.
Overinsurance duplicates public benefits, employer benefits, or savings and buys riders without a quantified risk; underinsurance leaves catastrophic gaps — unlimited liability, rebuilding, income loss, or dependants — uncovered.
Benefits may vary by: insurer · employment status · municipality · household
Get professional or administrator help: Ask an independent adviser to review duplication and catastrophic gaps together, not one product at a time.
Review due: 2026-10-30
Key points
- Price public and employer benefits before buying private cover.
- Small, budgetable losses are usually better self-funded.
- The costliest gaps are third-party liability, rebuilding, and lost income.
- Right-sizing beats both stacking riders and skipping catastrophic cover.
Map each yen to a real risk
List every risk, its public payer, your savings buffer, and the true residual loss. Insure the residual only where it is both large and uncertain. Cancel riders that duplicate cover you already hold, and raise limits where a single event could overwhelm the household.
Who this is for
- Residents mapping protection before shopping for private insurance
What this is not
- A quote, policy ranking, or individualized recommendation
- Eligibility, contributions, waiting periods, exclusions, and benefit amounts can vary. Confirm your case with the administering insurer or authority before acting.