In Japan, there are two types of social insurance systems available for employees: Kokumin Hoken and Shakai Hoken. Both systems offer different benefits and premiums, which can make it confusing for families to decide which system is cheaper for them. In this article, we will explore the differences between Kokumin and Shakai Hoken and provide a guide to calculating which system is cheaper for a family of three. Kokumin Hoken is a national health insurance system that covers individuals who are not eligible for the Shakai Hoken system. This includes self-employed individuals, freelancers, and those who work for companies with fewer than five employees. The premiums for Kokumin Hoken are based on the individual's income, making it a more affordable option for those who earn less.   On the other hand, Shakai Hoken is a social insurance system that is available to employees of companies with more than five employees. It provides benefits for health, pension, unemployment, and wo...