On November 19, 2025, Amazon Japan issued an urgent notice announcing that Japan's revised "Four Product Safety Laws" will take full effect on December 25, 2025. This regulatory upgrade represents a significant shift in Japan's approach to e-commerce oversight, for the first time directly including overseas cross-border sellers—particularly those selling batteries, power banks, and other electrical products—within its regulatory framework.

Core Changes: Direct Inclusion of Overseas Sellers as "Specified Importers"

The revised laws fundamentally redefine responsibility for product safety in Japan:

• "Specified Importer" Status: Overseas sellers who directly sell to Japanese consumers are legally designated as "Specified Importers" , breaking the previous model where only Japanese domestic importers bore primary responsibility.

• Dual Mandatory Requirements:

  1. Appointment of Japanese Domestic Administrator: Sellers must designate a representative in Japan with a valid Japanese address, Japanese language proficiency, and formal authorization to communicate with METI (Ministry of Economy, Trade and Industry) .
  2. METI Business Registration: Submit formal business notification to METI to complete registration .

Amazon's Specific Requirement: For all new ASINs created on or after December 25, 2025, business notification information must include details of both the overseas seller and the Japanese Domestic Administrator . Non-compliant products will face removal from the platform.

PSE Certification: The Mandatory Safety Threshold for Battery Products

Before any METI registration can occur, battery products must first obtain PSE certification—Japan's mandatory safety certification under the Electrical Appliances and Materials Safety Law (DENAN Law) .

Certification Types and Requirements for Battery Products

Technical Standards: Battery products must comply with Japanese Industrial Standards (JIS), including JIS C 8712 (for alkaline batteries), JIS C 8714 (for lithium-ion batteries), and reference tables 9 and 12 of the PSE regulations .

Complete Compliance Roadmap for Battery Products on Amazon Japan

Step 1: Product Certification (PSE)

• Type Selection: Determine whether your product requires Diamond or Round PSE based on energy density and intended use .
• Testing: Submit samples to a qualified laboratory for safety testing (insulation resistance, voltage withstand, temperature rise, overcharge protection, etc.) .
• Marking: After certification, permanently affix the appropriate PSE mark (≥5mm diameter) on the product, along with Japanese importer/responsible party information .

Step 2: 主体合规 (METI Registration & Japanese Domestic Administrator)

1. Select a Qualified Japanese Domestic Administrator:

   • Must have a physical address in Japan
   • Must be proficient in Japanese language
   • Must sign a formal contract with the seller

2. Submit METI Business Registration:

   • Through your Japanese Domestic Administrator or directly to METI
   • Receive a unique registration number (format: R-XXXX-XXXX) that must be marked on products alongside the PSE mark

Step 3: Platform Compliance (Amazon Japan)

• Upload Compliance Documents: PSE certificate, METI registration proof, and Japanese Domestic Administrator information to your Amazon seller account .
• Product Labeling: Ensure product images clearly show the PSE mark and all required safety information .
• Japanese Language Requirements: All product descriptions, instructions, and warnings must be in Japanese .

Common Compliance Pitfalls and Cost Estimates

Frequent Failure Points

• Incorrect Labeling: PSE mark too small, missing Japanese responsible party information (common cause for customs detention) .
• Incomplete Documentation: Missing Japanese-language manuals or technical files when submitting to Amazon or METI .
• Wrong Certification Type: Using Round PSE for products requiring Diamond PSE (high-energy-density batteries), leading to retesting and delays .

Cost and Timeline Estimates

Why Choose Guangdong Energy Storage Testing?

Facing complex regulations, unfamiliar administrative procedures, and tight deadlines, partnering with an experienced certification provider is crucial. Guangdong Energy Storage Testing offers:

• One-Stop Solution: Comprehensive services from PSE pre-testing, certification application to METI registration submission .

• Expert Risk Avoidance: Engineers with deep understanding of Japanese standards identify potential issues early, maximizing first-time pass rates and avoiding costly redesigns .

• Efficient Process Management: For product series, employs "main model testing + variation declaration" strategy to reduce costs and time .

• Post-Compliance Support: Ongoing monitoring of regulatory updates to ensure long-term compliance .

Conclusion: Act Now to Secure Your Japan Market Entry

Japan's regulatory landscape has changed permanently. After December 25, 2025, non-compliant battery products will be removed from Amazon Japan, potentially facing fines up to 1 million yen, and possible blacklisting from the Japanese market for up to 10 years .

Time is Critical: With less than one month until the deadline, immediate action is essential. Guangdong Energy Storage Testing stands ready to guide you through every step of the compliance process, ensuring your battery products meet all requirements and maintain market access in Japan.

Contact us today to schedule a compliance assessment and secure your position in the Japanese market before the December 25 deadline.