PSE certification is mandatory in Japan.This is a mandatory safety certification implemented by Japan for electrical and electronic products, intended to verify that these products have passed safety standard tests in accordance with the Japanese Electrical and Material Safety Law (DENAN Law) or international IEC standards.

PSE certification is available in two types: diamond-shaped and round. The diamond-shaped PSE certification is a mandatory certification for specific electrical appliances, including 165 types such as chargers and adapters. All electrical products entering the Japanese market must obtain the diamond-shaped PSE certification. In contrast, the round PSE certification is a voluntary certification for non-specific electrical appliances, covering a wide range of products like batteries, mobile power banks, humidifiers, electric tools, and household appliances.

The above information is for reference only. For more detailed information, it is recommended to consult a professional PSE certification agency or relevant experts.