PSE certification is a compulsory safety certification in Japan. It is used to prove that electrical and electronic products have passed the safety standards test of the Japanese Electrical and Material Safety Law (DENAN Law) or international IEC standards. Japan's DENTORL Act (Electrical Device and Material Control Act) stipulates that 506 products must pass safety certification to enter the Japanese market. Among them, 165 types of A products should obtain the diamond-shaped PSE mark, and 341 types of B products should obtain the circular PSE mark.