Can anyone participate in the health insurance programs?

Upon joining an organization, the employees and the families of those employed by government offices, the private sector and public organizations autoｍatically join the program.
The employee and employer pay about 50% each of the insurance premium.
Anyone can join the National Health Insurance program operated by municipalities throughout the nation.
Those insured include employees of small companies, self-employed people, unemployed people, students, and foreigners.
Since 1961, people who are not members of the Health Insurance Union have been required to join this program, which is the foundation of Japan's social security system.