The PSE certification is a mandatory safety certification in Japan, used to prove that electrical and electronic products have passed the safety standard tests of Japan's Electrical Appliance and Material Safety Law (DENAN Law) or the international IEC standards. Japan's DENTORL Law (Electrical Appliance and Material Control Law) stipulates that 498 types of products must pass safety certification before entering the Japanese market. Among them, 165 types of Class A products should obtain the diamond-shaped PSE mark, and 333 types of Class B products should obtain the circular PSE mark.
Since April 1, 2001, the "Electrical Appliance and Material Control Law (DENTORL)" has been officially renamed as the "Electrical Appliance Safety Law (DENAN)". Different from the control of the previous regulatory system through agreement-based provisions, the new system will ensure the safety of products by non-governmental institutions.