For Southeast Asian exporters looking to sell on Alibaba.com and access the Japanese market, understanding PSE (Product Safety Electrical Appliance & Material) certification is non-negotiable. This mandatory safety certification, enforced by Japan's Ministry of Economy, Trade and Industry (METI), applies to all electrical products including power banks, chargers, and battery packs entering Japan [1].
The certification framework distinguishes between Diamond PSE (Category A - Specified Electrical Appliances) and Circle PSE (Category B - Non-Specified Electrical Appliances). This distinction is critical for power bank exporters because it determines testing requirements, certification costs, and time-to-market. Most portable power banks fall under Circle PSE, but high-capacity units (≥400Wh/L) require the more stringent Diamond PSE certification [3].
PSE Certification Classification Comparison
| Feature | Diamond PSE (Category A) | Circle PSE (Category B) |
|---|---|---|
| Product Types | 116 specified high-risk products (chargers, transformers, adapters) | 341 non-specified products (batteries, power banks, cables) |
| Certification Type | Third-party mandatory certification | Self-declaration with testing |
| Processing Time | 6-8 weeks | 1-2 weeks |
| Cost Range | ¥25,000-30,000 JPY | ¥2,000-8,000 JPY |
| Testing Standards | JIS or IEC standards mandatory | JIS or IEC standards applicable |
| METI Registration | Required with Japanese importer | Required with Japanese importer |
| Validity Period | 3 years | 3 years |
| Mark Shape | Diamond-shaped PSE mark | Circular PSE mark |
The December 25, 2025 regulatory update significantly tightened enforcement for lithium battery products. Under the new rules, all power banks must display the PSE mark visibly on the product itself, not just on packaging. Additionally, METI registration now requires a designated Japanese domestic manager (importer of record) who assumes legal responsibility for product compliance [4].

