A shipment of medical devices can face customs stoppage in Tokyo when the AC adapter label fails to meet strict Japanese regulations. Many importers encounter this compliance risk due to confusion between the PMD Act and the DENAN Law. METI enforces the DENAN Law and focuses on the PSE mark differences, while MHLW oversees medical devices. Although both ministries sometimes coordinate on industry issues, importers often struggle because their enforcement remains separate. This gap can lead to illegal import status for non-compliant adapters.
Key Takeaways
Understand the difference between Diamond PSE and Circle PSE marks. Diamond PSE indicates high-risk products requiring strict testing.
Always ensure that external medical power adapters have the Diamond PSE mark. This mark is mandatory for compliance.
Recognize that there is no medical exemption for external adapters. All must meet the Diamond PSE certification requirements.
Verify that the registered Japanese importer’s name appears on the adapter label. This is crucial for legal importation.
Use J-Standards for PSE testing. Ensure compliance with Japan’s specific requirements, including voltage and plug specifications.
Consider partnering with a local company like DILITHINK. They can help manage certification and compliance, reducing your risk.
Keep thorough records of compliance testing and product specifications. METI requires documentation for three years.
Stay updated on PSE regulations. Regularly check resources to ensure ongoing compliance and avoid customs issues.
Decoding the Marks: Diamond E vs. Circle (PS)E
Understanding pse mark differences is crucial for any company importing medical devices into Japan. METI, the Ministry of Economy, Trade and Industry, enforces the DENAN Law and strictly monitors the use of the correct pse mark on power adapters. Failure to comply can result in customs stoppage, illegal import status, and significant compliance risk for your shipment.
Diamond PSE (E): Category A
“Specified Electrical Appliances” (High Risk). Includes DC Power Supply Units (AC Adapters). Requires Factory Inspection + Third-Party Testing (RCAB).
The Diamond PSE mark appears as a diamond-shaped outline with the letters “E” inside. This mark signals that the product falls under “Specified Electrical Appliances,” which METI classifies as high risk. DC power supply units, including most AC adapters for medical devices, belong to this category. To obtain pse certification for these products, manufacturers must undergo rigorous third-party testing by a METI-Registered Conformity Assessment Body (RCAB) and pass a factory inspection. METI requires this process to ensure that high-risk electrical products meet Japanese safety standards before entering the market.
⚠️ Compliance Risk: Using an adapter without the Diamond PSE mark can trigger customs stoppage and result in illegal import status. METI will not accept self-declaration for these products.
Circle PSE ((PS)E): Category B
“Non-Specified Electrical Appliances” (Lower Risk). Self-declaration is sufficient.
The Circle PSE mark features a simple circle with the letters “(PS)E” inside. This mark applies to “Non-Specified Electrical Appliances,” which METI considers lower risk. Products in this category can enter the Japanese market through a self-declaration process, without the need for third-party testing or factory inspection. While this route offers a simpler path to pse certification, it does not apply to most external medical power adapters.
|
Type of Product |
PSE Mark Type |
|
|---|---|---|
|
Specified Electrical Products |
Diamond PSE |
Requires third-party assessment by a METI-Registered CAB |
|
Non-Specified Electrical Products |
Circle PSE |
Subject to self-declaration scheme |
The Verdict for Medical
99% of external medical power adapters fall under Category A (Diamond). There is no “Medical Exemption” for adapters.
Medical device manufacturers often assume that their products are exempt from pse certification due to regulation under the PMD Act. However, METI treats the external AC adapter as a standalone consumer product. Nearly all external adapters for medical devices require the Diamond PSE mark. There is no medical exemption for these adapters. Attempting to import a medical device with an uncertified adapter exposes the importer to severe compliance risk, including customs stoppage and illegal import status.
🚨 Advisory: Always verify the pse mark differences on your adapter label before shipping. Ensure the Diamond PSE mark is present and visible, especially for external power supplies. METI will enforce these requirements without exception.
Importers must understand the pse mark differences and the strict requirements for pse certification. Proper labeling and certification protect against customs delays and ensure legal importation of medical devices into Japan.
The “Exemption” Rule: External vs. Built-in Power
External Adapters = Mandatory Diamond PSE
Treated as a standalone consumer product by METI. Must be certified independently.
METI enforces strict rules under the DENAN Law for all electrical products entering Japan. External AC adapters, which power most medical devices, fall under the category of standalone consumer products. METI requires each external adapter to undergo a full pse compliance inspection before import. This process includes third-party testing and factory audits. The Diamond PSE mark must appear on the adapter label, along with the registered Japanese importer’s name. Failure to meet these requirements can result in customs stoppage, illegal import status, and significant compliance risk for the importer.
⚠️ Advisory: METI does not recognize the medical device as a shield for the adapter. Each external adapter must achieve independent pse certification, regardless of its intended use. Importers who overlook this rule face the risk of shipment delays and legal penalties.
A summary of the external adapter requirements:
Treated as a separate product under DENAN Law
Subject to mandatory pse compliance inspection
Must display the Diamond PSE mark and importer name
Non-compliance leads to customs stoppage and illegal import status
Built-in / Open Frame Power = Usually Exempt
Crucial distinction: A power supply embedded inside the medical device is considered a “Component.” It does NOT need a PSE mark itself; the safety is covered by the medical device’s T-Mark or PMDA approval.
Open frame or built-in power supplies present a different scenario. METI classifies these units as components, not as standalone consumer products. When a power supply is permanently embedded inside a medical device, it becomes part of the overall system. The device itself must pass medical safety standards, such as the T-Mark or PMDA approval, but the internal power supply does not require a separate pse mark.
🛑 Note: Attempting to import an open frame power supply as a loose part or accessory will trigger a pse compliance inspection. Only when the power supply is fully integrated into the medical device does the exemption apply.
This exemption exists because METI recognizes that the safety of the component is already evaluated during the medical device approval process. The risk of customs stoppage or illegal import arises only if the importer misclassifies the product or fails to follow the correct procedures.
Power Supply Type | PSE Requirement | Compliance Risk |
|---|---|---|
External Adapter | Diamond PSE mandatory | High (Customs Stoppage, Illegal Import) |
Built-in/Open Frame | Exempt if embedded | Low if properly classified |
Importers must understand the distinction between external and built-in power supplies. Proper classification and adherence to METI’s rules ensure smooth customs clearance and reduce compliance risk. Always verify the product type and required pse certification before shipping to Japan.
The Technical Hurdle: J-Standards & CB Reports
Standards Mapping
Explain that PSE testing is based on J-Standards (e.g., J62368-1), which are harmonized with IEC but have Japanese deviations (100V, plug blades).
Japan enforces the electrical appliance and material safety law through METI, which requires strict adherence to national standards for all imported electrical products. PSE certification for medical power adapters relies on J-Standards, such as J62368-1. These standards align closely with international IEC standards but include unique Japanese deviations. For example, Japan specifies a 100V supply voltage and requires plug blades that match local outlets. These differences mean that even adapters certified elsewhere may not automatically comply with the electrical appliance and material safety law in Japan.
Manufacturers must understand that the electrical appliance and material safety act mandates conformity test procedures tailored to Japanese conditions. METI will not accept products that only meet generic IEC requirements. Customs officials check for these technical details during inspections. Failure to comply with the electrical appliance and material safety law can result in customs stoppage or illegal import status. Companies must ensure that every aspect of their product, from voltage to plug design, matches Japanese expectations before shipping.
Can I use my IEC CB Report?
Yes, but only if it includes the “Japan National Differences.” Otherwise, re-testing is required.
Many manufacturers hope to streamline the certification process by using an existing IEC CB Report. METI allows this approach under the electrical appliance and material safety law, but only if the report covers all Japan National Differences. The electrical appliance and material safety act requires that the conformity test results reflect Japanese deviations, not just global standards. If the CB Report omits these details, METI will demand additional conformity test procedures or full re-testing.
Common pitfalls include missing documentation for 100V operation or incorrect plug blade specifications. Customs officials often flag these issues, leading to compliance risk and shipment delays. To avoid customs stoppage or illegal import, manufacturers should work with recognized certification bodies. Organizations like JQA offer global approval services that integrate CB Test Certificates with Japanese requirements. Their S-JQA mark demonstrates that the product has passed all necessary conformity test steps under the electrical appliance and material safety law. This approach reduces certification costs and accelerates time-to-market.
⚠️ Advisory: Never assume that an international CB Report guarantees acceptance in Japan. Always verify that the conformity test includes every Japanese deviation required by the electrical appliance and material safety law. METI will enforce these rules strictly, and non-compliance can halt your shipment at customs.
The “Importer” Requirement: Who Holds the Certificate?
No Importer, No Mark
The law requires the Registered Japanese Importer’s Name to be printed on the label next to the PSE mark.
METI enforces the DENAN Law with strict attention to the importer requirement. Every medical device manufacturer seeking entry into the Japanese market must understand that the absence of a registered importer leads directly to customs stoppage and illegal import status. The law mandates that the registered Japanese importer’s name appears on the label beside the pse mark. Without this, customs officials will not allow the product to pass, regardless of its technical compliance.
Importers serve as the legal manufacturers under the PSE Act. They must notify METI before selling any regulated appliance, including medical power adapters. The importer assumes responsibility for compliance, quality control, and record keeping. METI expects the importer to track each unit sold and maintain testing records for three years. The labeling must include the pse mark, the name of the notifying supplier, and product specifications. Failure to meet these requirements exposes the importer to compliance risk and severe penalties.
Responsibility | Description |
|---|---|
Notification to METI | Importers must notify METI to sell PSE-regulated appliances. |
Compliance with Standards | Importers ensure products meet technical standards and display the PSE mark. |
Quality Control | Importers track each unit sold, ensuring safety and compliance. |
Record Keeping | Testing records must be preserved for three years. |
Labeling | Label must show PSE mark, importer name, and product specifications. |
⚠️ Advisory: Customs stoppage and illegal import status result from missing importer information. METI will enforce these rules without exception.
Solving the Liability Issue
How DILITHINK provides PSE-certified adapters where we (or our partner) act as the certificate holder, saving the client from complex legal paperwork.
Foreign manufacturers often face compliance risk when they lack a registered Japanese importer. The PSE Act treats the importer as the manufacturer, making them responsible for conformity inspection and product liability. Without a local partner, obtaining pse certification becomes nearly impossible. METI requires the importer to submit applications, manage quality control, and maintain records. The absence of a registered importer complicates compliance and can halt medical device sales.
DILITHINK addresses this challenge by acting as the certificate holder for pse-certified adapters. The company or its partner assumes the legal responsibilities, including notification to METI, conformity assessment, and record keeping. This service streamlines the process for medical device manufacturing and sales, allowing foreign manufacturers to focus on their core business. DILITHINK ensures that every adapter meets Japanese standards and displays the correct labeling, including the importer name.
Manufacturers must submit product samples and documentation for conformity assessment. The process includes reviewing standards, conducting compliance testing, and issuing certificates. DILITHINK manages these steps, reducing the burden on clients and minimizing compliance risk. The company also maintains all required documentation for customs inspections, such as application forms, construction outlines, and user manuals. This approach supports medical device license holders and those with a manufacturing and sales license, ensuring smooth entry into the Japanese market.
🚨 Warning: Penalties for non-compliance include imprisonment for up to one year, fines up to 1 million yen, or both. Severe violations may result in additional fines up to 100 million yen. METI enforces these penalties rigorously.
Foreign manufacturers seeking to expand medical device manufacturing in Japan must prioritize compliance with the importer requirement. DILITHINK’s solution enables legal importation, protects against customs stoppage, and supports ongoing medical device license and manufacturing and sales license needs.
A $20 adapter can trigger customs stoppage and illegal import status, risking a $50,000 medical system launch. METI enforces strict requirements for Diamond PSE marks, importer names, and valid certificates. Companies must verify each adapter’s compliance before shipment. For ongoing updates on PSE regulations and medical device approval, manufacturers can consult these resources:
|
Resource Description |
Link |
|---|---|
|
Overview of PSE regulations and requirements for electrical products |
|
|
Information on importing medical devices and necessary licenses |
|
|
Details on electrical safety and EMC requirements |
✅ Checklist: Diamond PSE mark, registered importer name, and valid certificate.
📥 Download DILITHINK’s “Japan PSE Compliance Matrix” for step-by-step guidance.
FAQ
What is the main risk for importing medical devices with uncertified adapters?
Customs Stoppage occurs when METI finds a device adapter lacking proper certification. Illegal Import status follows, exposing the importer to Compliance Risk. The electrical appliance and material safety law enforcement order requires every medical device adapter to display the correct mark and importer name.
Does the electrical appliance and material safety law enforcement order apply to all medical devices?
METI enforces the electrical appliance and material safety law enforcement order for every device adapter. Highly-regulated medical devices must comply with both medical and electrical safety requirements. The application of this law covers external adapters, not integrated controlled medical devices.
Can a device use an IEC CB Report for PSE certification?
A device manufacturer may submit an IEC CB Report for application, but METI accepts it only if it includes Japan National Differences. The electrical appliance and material safety law enforcement order demands conformity to local voltage and plug standards for medical devices.
Is there a medical exemption for external adapters?
No exemption exists for external adapters powering medical devices. METI treats each adapter as a standalone device. The application of DENAN Law requires Diamond PSE certification. Failure to comply leads to Customs Stoppage and Illegal Import status.
Who must appear on the adapter label for legal import?
The registered Japanese importer’s name must appear beside the PSE mark. METI enforces this requirement for every device. The application of the electrical appliance and material safety law enforcement order ensures traceability and accountability for medical devices.
Are built-in power supplies exempt from PSE certification?
Built-in power supplies embedded in medical devices usually receive exemption. METI considers them components of the device. The application of medical safety standards covers their safety. Only external adapters require Diamond PSE certification.
What documentation does METI require for medical device import?
METI expects device manufacturers to submit conformity assessment reports, application forms, and construction outlines. The electrical appliance and material safety law enforcement order mandates record keeping for three years. Compliance Risk increases without proper documentation for medical devices.
How can DILITHINK help with medical device adapter certification?
DILITHINK acts as the certificate holder for medical device adapters. The company manages application, testing, and labeling. This service reduces Compliance Risk and prevents Customs Stoppage or Illegal Import for medical devices entering Japan.
