Japan PSE Mark and DENAN Act: A Guide for Turkish Manufacturers Exporting Electrical Products

Introduction: The gateway to the Japanese market for electrical products.

Japan has one of the world's most established safety regimes for consumer electrical and electronic products. When a Turkish manufacturer wants to ship a power supply, cable, socket, lighting fixture, or household electrical appliance to Japan, the product must comply with the PSE (Product Safety of Electrical Appliances and Materials) regime before being placed on the market. It is prohibited to sell or display for sale in Japan any product that does not have the PSE mark.

The legal basis for the PSE regime is the 'Electrical Appliances and Materials Safety Act' (電気用品安全法, Denki Yōhin Anzenhō), known in Japanese as DENAN. The law is administered by the Ministry of Economy, Trade and Industry of Japan (METI). The key feature of the regime is its risk-based approach: not all products are subject to the same obligations; two different markings and two different compliance pathways are implemented depending on the product's risk level.

This article aims to explain, in an objective manner, what the DENAN Act is, the difference between diamond and round PSE markings, the notification and conformity process to METI, and the practical implications of all this for Turkish manufacturers exporting to Japan. For specific category classification and final conformity decisions, the current official texts of METI should always be consulted.

• PSE = electrical equipment and material safety mark; its legal basis is the DENAN Act.
• The law is governed by METI; products within its scope cannot be sold in Japan without the PSE mark.
• The regime is risk-based: there are two separate markings and two separate compliance pathways depending on the risk of the product.

What are the DENAN Act and the PSE symbol?

The DENAN Act is the framework law that defines the safety requirements for electrical appliances and materials manufactured or imported into Japan. The basic principle of the law is to cover specific product categories, define technical safety standards for these products, and make compliance with these requirements visible through the PSE mark. The basis for this marking is that the product has been proven to comply with the relevant technical standards and that the necessary operational/notification obligations have been fulfilled.

The PSE regime, in its current form, adopted the present marking system (diamond and round PSE) with the regulation that came into effect on April 1, 2001; the previous marking system was abolished on that date. The regime places the responsibility on the party offering the product to the Japanese market: in the case of domestic production, the producer, and in the case of imports, the importer, assume the obligations as the 'Notifying Supplier'.

• DENAN defines the technical safety requirements and marking rules for electrical products within its scope.
• The current diamond/round PSE marking system came into effect on April 1, 2001.
• The responsibility lies with the party that brings the product to market (domestic producer or importer).

Diamond PSE and Round PSE: the difference between the two categories

Products covered by DENAN are divided into two groups according to their risk level. According to publicly available sources, approximately 457 product categories are covered in total; since this number and its sub-distribution may change over time with METI regulations, the official list should be used as the basis for precise classification.

Specified Electrical Equipment and Materials are higher-risk products with a history of accidents or those considered to have a high probability of causing injury. For this group, third-party conformity assessment by a Registered Conformity Assessment Body (RCAB) registered with METI is mandatory, and after obtaining the certificate of conformity, the diamond-shaped PSE mark is affixed to the product. It is stated that this group commonly includes approximately 116 categories.

Non-Specified Electrical Appliances and Materials (NSAIDs) are a lower-risk group encompassing most household products. This group does not require third-party certification; the manufacturer/importer assumes responsibility for the product's conformity to technical standards through self-declaration and affixes the round/circle PSE mark to the product. It is stated that this group commonly includes approximately 341 categories. Self-declaration does not imply non-conformity; responsibility lies solely with the supplier, rather than a third party.

• Certain products (diamond PSE): high risk; third-party conformity assessment (registrar) mandatory; ~116 categories.
• Uncertain products (rounded PSE): lower risk; self-declaration sufficient; ~341 categories.
• A total of approximately 457 categories (as of December 2018); distribution may change with METI regulations.
• Even with self-declaration, the obligation to comply with technical standards and keep records continues.

METI notification and compliance process

Businesses that manufacture or import electrical appliances or materials are required to notify METI after commencing operations; the party making this notification is referred to as the 'Notifying Supplier' in the law. The notification includes information such as the type of business and product type classification (including katashiki). Publicly available sources state that this notification must be made within 30 days of the commencement of operations; the exact deadline and format should be based on official METI procedural texts.

Following notification, the supplier is obligated to ensure the product conforms to the relevant technical standards, conduct the mandatory final inspection (self-inspection) before shipment, and retain inspection records for the period stipulated by law (specified as 3 years in the sources). If the product falls into a 'specific' category, in addition to these steps, a third-party conformity certificate from a registered conformity assessment body is required. After all obligations are fulfilled, the correct type of PSE mark (diamond or round) and supplier/importer information are affixed to the product.

• 1) The company notifies METI of the work (Notifying Supplier).
• 2) The product is brought into compliance with the relevant technical standards.
• 3) A mandatory final inspection is carried out before shipment; records are kept (for 3 years according to sources).
• 4) A third-party conformity certificate is obtained from the registered organization for the 'specific' product.
• 5) The correct PSE mark and supplier/importer information are affixed to the product.

What does this mean for Turkish manufacturers?

The critical point is this: legal obligations under DENAN (METI notification, PSE marking, record keeping) are fulfilled through the Japanese party importing the product for export to Japan. In the case of import, the Notifying Supplier is the importer in Japan; they are the party that makes the notification, assumes compliance, and writes their information on the PSE label. It is practically impossible for a foreign manufacturer to directly notify METI as a 'notifying supplier'; therefore, the Turkish manufacturer needs to work with an importer/business partner based in Japan.

This structure does not mean that the Turkish manufacturer is irresponsible. The importer can only prove conformity with test data, technical files, and, if necessary, third-party documents received from the manufacturer. Therefore, the Turkish manufacturer should determine early on whether their product falls into the 'specific' or 'unspecified' category, prepare the necessary test records, and, if it falls into the 'specific' category, plan to have the product tested by a registered conformity assessment body recognized by METI. These bodies and recognized test report regulations are determined by METI.

In summary, success in exporting electrical products to Japan relies on early category identification, a robust technical file, the correct selection of the PSE mark (diamond/round), and a coordinated compliance plan with the importer in Japan. The fact that the product is CE or certified according to another market does not automatically guarantee compliance with Japanese technical standards; DENAN's own technical requirements must be met.

• In import procedures, the legally responsible party is the importer in Japan (Notifying Supplier); the foreign manufacturer does not directly provide notification.
• The Turkish manufacturer should work with an importer/business partner based in Japan.
• Determine early whether the product is 'certain' or 'uncertain'; prepare test logs and technical documentation.
• ‘Third-party testing/certification should be scheduled at a METI-registered organization for the 'specific' product.
• CE or other certifications do not automatically meet DENAN technical requirements.

Frequently Asked Questions

What exactly is the PSE symbol and what law is it based on?

PSE is a mark indicating that electrical appliances and materials comply with Japan's safety requirements. Its legal basis is the DENAN Act (Electrical Appliances and Materials Safety Act), administered by METI. A product within its scope cannot be sold or displayed for sale in Japan without the PSE mark.

What is the difference between diamond PSE and round PSE?

Diamond PSE is for high-risk, 'specific' products and requires third-party conformity assessment by a METI-registered organization. Round/circle PSE is for lower-risk, 'uncertain' products; here, the manufacturer/importer assumes conformity through self-declaration. The choice of the correct mark depends on the product category.

As a Turkish manufacturer, can I notify METI directly?

In practice, no. When it comes to imports, the notification and labeling obligation rests with the importer in Japan (the Notifying Supplier). Therefore, you need to work with an importer or partner based in Japan. As the manufacturer, you provide the importer with test data and technical documentation.

My product is CE marked; do I need to do anything again in Japan?

Yes. CE or other market-specific certification does not automatically guarantee compliance with DENAN's own technical requirements. Product evaluation according to Japanese technical standards, selection of the correct PSE mark, and third-party assessment (if the product falls into a 'specific' category) are also required.

How many product categories are included in PSE?

According to publicly available sources, a total of approximately 457 categories are covered (as of December 2018); commonly referred to as 'certain' (diamond) and 'uncertain' (rounded). Since these numbers are subject to change with METI regulations, always refer to the most current official list for your product's classification.

This content is for informational purposes only and does not constitute legal opinion or compliance assessment. Current official sources from the relevant country should be consulted for precise obligations.