Walking 8,000 steps a day or eating healthy food may now save you money as some Japanese insurers move to sell policies that offer premium discounts or refunds to those living healthily.

These types of insurance policies may cut Japan's medical and nursing care costs, which have been growing due to its increasingly graying society.

Earlier this month, Tokyo-based Neo First Life Insurance Co. launched a new medical policy that pays lump-sum allowances when the insured is admitted to a hospital for such lifestyle-related diseases as cancer and heart disease.