Ministry of the Environment outsources research to three groups including Hokkaido University on health effects of PFAS. PFAS does not originally exist in the natural world, and three out of the more than 10,000 artificially created types are considered harmful.
The World Health Organization's cancer research institute assessed that two types of harmful substances are carcinogenic, but the government has not had enough scientific knowledge to date. The plan is to find out whether there are highly toxic PFAS in the products.