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The development characteristic of Japan's product safety certification system is the shift from mandatory certification to recommended certification. The T (T-Mark) signifies a government-mandated certification mark, while the S (S-Mark) signifies a recommended certification mark. Both T and S marks are only applicable in Japan. Since Japan has few self-established standards, its product standards are mainly converted from IEC and UL standards.
Currently, the main trend in global safety certification is to unify standards through efforts by organizations such as ISO and IEC, although significant differences still exist. However, the consistency of regional standards has become a basic trend. Another trend is the coexistence of mandatory and recommended certifications. The safety certification marks for electromechanical products in major global regions and countries are shown in Table 3.
• Japan DENTORI Law (Electrical Appliances and Materials Control Law)
－165 types of Class A products: T-Mark
－333 types of Class B products: S-Mark
• The 333 types of Class B products are divided into 7 categories:
－Simple wiring tubes and junction boxes
－Single-phase motors between 100V and 300V
－Household electric heating products
－Household electrical or electronic entertainment products
－Civil or household products using light sources
－Household and commercial electronic products
－Other electrical products between 100V and 300V
Japan's DENTORI Law (Electrical Appliances and Materials Control Law) stipulates that 498 types of products entering the Japanese market must pass safety certification. Among them, 165 types of Class A products should obtain T-MARK certification, and 333 types of Class B products should obtain S-MARK certification.
