It's compulsory to pay health insurance (kokumin kenko hoken) in Japan. The amount you pay is calculated from your income. The insurance is deducted from the cost of your medical bills. For under three year old children, medical care is free. For adults, the reduction is 70%. For seniors, the reduction is 90%. This article is an incomplete entry. Please help Tsukuba Wiki by [ editing this page]. TSUKUBA WIKI PROJECT ( pages) home || empty pages || short pages || contact us