Japan PSE Certification for Electronics from China

Japan PSE certification is a mandatory safety approval for electrical appliances and materials sold in Japan, required under the Electrical Appliance and Material Safety Law (DENAN Law), administered by the Ministry of Economy, Trade and Industry (METI). Chinese electronics must carry the correct PSE mark (diamond or circle) before sale, and legal responsibility falls on the importer, not the Chinese factory.

The PSE system splits products into two groups: specified electrical appliances (Category A, roughly 116 higher-risk items) needing the diamond PSE mark and third-party certification, and non-specified appliances (Category B, 340 items) needing the circle PSE mark under a simpler route. Knowing which group your product falls into shapes everything downstream: testing, timeline, cost, and what the factory must provide. CN Ally coordinates this factory-side compliance work — test samples, technical documents, and lab communication — as part of sourcing, because most Chinese manufacturers have never dealt with METI requirements directly.

What is PSE certification, and which law requires it?

PSE stands for Product Safety Electrical Appliance & Material. It is Japan's mandatory electrical safety mark, created by the Electrical Appliance and Material Safety Law — the DENAN Law — which METI enforces. The law dates to 2001, when it replaced the older Electrical Appliance and Material Control Law, and it controls which electrical products may be manufactured, imported, and sold in Japan.

A common misunderstanding is that PSE is a single certificate like CE marking in Europe. It isn't. PSE is a compliance regime with obligations that sit in three places: the notifying supplier (the importer or domestic business introducing the product in Japan), the manufacturer, and the registered conformity assessment body that certifies higher-risk products. Every regulated product must be tested against Japanese technical standards (typically JIS, or IEC with Japanese deviations) and must display the PSE mark with the importer's name before sale. One practical detail worth knowing early: Japan runs on 100V (single phase), at 50Hz or 60Hz depending on the region, with Type A/B plugs. Products designed only for 220–240V markets cannot simply be relabeled for Japan.

Diamond PSE vs circle PSE: which one covers your product?

This is the first classification decision you make, and it determines the whole certification path. Under the DENAN Law, regulated products are divided into specified electrical appliances and materials (Category A) and non-specified electrical appliances and materials (Category B).

Specified products — the diamond PSE group — are the higher-risk items: power cords, plugs, adapters, thermal fuses, electric heating appliances, rice cookers, hair dryers, power tools, transformers, battery chargers, and DC power supply units. Category A covers roughly 116 product types, which must carry the diamond mark, undergo certification by a METI-registered conformity assessment body (RCAB), and pass an initial factory inspection.

Non-specified products — the circle PSE group — cover roughly 340 product types: televisions, computers, monitors, LED lamps, audio equipment, electric irons, vacuum cleaners, washing machines, and microwave ovens. These carry the circle mark under a self-declaration scheme, with no RCAB certification or factory inspection.

Diamond PSE (Category A, specified) · Circle PSE (Category B, non-specified)

• Product risk: Higher risk: cords, plugs, heaters, chargers, transformers · Lower risk: TVs, computers, lamps, small appliances
• Number of product types: About 116 · About 340
• Certification route: Third-party certification by a METI-registered body (RCAB) · Self-declaration; no RCAB certificate required
• Factory inspection: Required — initial inspection by the certification body · Not required
• Who may test: METI-registered test lab (local or overseas) · Manufacturer or any third-party lab with the right capability
• Mark on the label: Diamond PSE mark + RCAB name · Circle PSE mark (no RCAB name)
• Certificate validity: 3, 5, or 7 years depending on classification · 3 years

The classification depends on the product type, not the brand or price. An AC adapter can be a specified product while a television is non-specified — check METI's designated lists before committing to a factory, since reclassifying after testing starts wastes weeks.

Who is responsible for PSE compliance — you or your factory?

The importer is. This is the point that trips up the most first-time buyers: a Chinese factory cannot hold PSE certification on your behalf. The legal entity that answers to METI is the "notifying supplier" — the business that manufactures or imports the product in Japan.

For foreign buyers sourcing from China, that usually means one of two setups. Either you have a Japanese entity (your own subsidiary, a joint venture, or an appointed importer of record) that acts as the notifying supplier, or you work through a Japanese partner who takes that role. For diamond PSE products, the license must be issued to a Japanese company, and only one factory may be shown on the certificate.

The notifying supplier must file a Business Commencement Report with METI before importing, confirm each product conforms to the technical requirements, affix the PSE mark, keep inspection records for three years, and submit those records to METI on request. The manufacturer — your Chinese factory — is separately responsible for conducting product inspections, maintaining test equipment, and keeping its own inspection records for three years.

Self-inspection happens before import or upon arrival, and METI's guidance sets no requirement on who performs it or where, as long as it is properly carried out and recorded. That means you need a documented inspection step in your supply chain, not a handshake assurance from the factory.

What does PSE testing actually involve?

Testing measures the product against the Japanese technical standards for its product type: JIS standards, or IEC standards with Japanese deviations. METI publishes the technical requirements per category, and IEC test reports with Japanese deviation are accepted for most products, according to TÜV SÜD, one of the RCABs.

What gets tested depends on the product, but safety testing for a typical electronic device covers protection against electric shock, insulation and dielectric strength, temperature rise under normal and abnormal operation, mechanical structure, and fire resistance. EMC compliance is required where applicable. For IT and AV equipment, JIS C 62368-1 is replacing the older JIS C 60950-1, so confirm the applicable version before testing.

The factory must supply the evidence behind the test: circuit diagrams, bill of materials, specifications, and any existing CB (IEC) test reports, which can narrow the re-testing scope. For diamond PSE, the certification body's inspector also visits the factory to audit its quality management system and test equipment. Periodic re-inspection isn't required afterward, but changing components or specifications quietly invalidates the certification.

One design-level trap: Japanese standards for plug dimensions, conductor sizes, and insulation thickness can differ from IEC or Chinese GB norms. A charger that passes Chinese CQC testing may still fail PSE on dimensional grounds — align on JIS requirements before tooling.

How long does PSE certification take, and what does it cost?

There is no official fee schedule — labs quote per project, based on product type, number of models, and existing test data. Industry sources give a realistic planning range rather than a promise.

For diamond PSE products, testing and certification typically take four to eight weeks from sample submission, with budgets often quoted around USD 5,000–6,500 per SKU for products like LED panel lights. A valid CB (IEC) test report supplied up front narrows the re-testing scope and can compress timelines toward four to six weeks. Circle PSE products move faster — usually two to four weeks — with no RCAB certification or factory inspection in the loop. These are typical figures from testing labs and compliance consultancies, not METI figures.

The costliest delays rarely come from the lab — they come from incomplete technical documentation, samples that don't match the final spec, or discovering late that the product needs a different certification route. Locking the bill of materials before samples go to the lab is the cheapest way to protect your timeline.

What must the PSE label show?

Per METI's procedures, the label must include:

1. The PSE mark itself — diamond or circle, as appropriate to the product category.
2. The name of the registered conformity assessment body that conducted the conformity assessment (specified/diamond products only), as an abbreviation or registered trademark.
3. The name of the notifying supplier — the importer or domestic business.
4. Ratings and other items stipulated in the technical requirements — voltage, frequency, current, and whatever else the product's technical standard requires.

For small parts like electric wires, fuses, and wiring devices where there isn't room for the full mark, METI allows a simplified form: <PS>E for the diamond mark and (PS)E for the circle mark. Labels are checked at customs and by retailers, so the marking needs to be on the product — not just the box — before it ships from China.

What happens if you import electronics into Japan without PSE?

The DENAN Law backs the marking requirement with criminal penalties. Selling or displaying for sale electrical appliances without proper PSE labeling can lead to imprisonment with work of up to one year, a fine of up to one million yen, or both. Failing to file the business notification or keep inspection records for three years carries a fine of up to 300,000 yen, and liability can extend to the company itself.

In practice, the commercial consequences usually bite first: customs detention, stop-sale orders, recalls, and marketplaces that refuse to list unmarked products. For most importers, the math is simple — certification costs a fraction of one detained shipment.

What your Chinese factory must actually do

PSE compliance fails most often at the factory, not at the lab. The legal responsibility sits with you as the importer, but the samples, documents, and production consistency come from the factory floor. Before you place a purchase order, make sure the factory can and will do the following:

• Supply complete technical files: circuit diagrams, parts lists, specifications, and any existing CB or IEC test reports. A factory that can't produce a bill of materials in English is waving a red flag.
• Provide samples that match final production: the tested unit must represent what ships. Swapping a cheaper capacitor or plug after certification technically breaks the conformity the certificate covers.
• Open the factory for inspection: for diamond PSE, the RCAB audits the factory's quality system and test equipment on site — not over a video call.
• Keep production consistent and keep records: the factory must run product inspections, maintain test equipment, and hold inspection records for three years.

This is where importers without staff in China struggle, because it requires verifying claims rather than accepting them. CN Ally handles this layer during sourcing and production: confirming the factory's technical documents are complete before samples go to the lab, and running factory audits so the inspected facility is the one actually making your goods.

Frequently asked questions

Is PSE certification required for every electronic product sold in Japan?

No. PSE applies only to the product categories designated under the DENAN Law — roughly 116 specified and 340 non-specified types. Many low-voltage DC accessories (a plain USB cable with no mains connection, for example) fall outside the scope entirely. But anything that plugs into AC mains or charges from it should be assumed to need the PSE mark until verified otherwise. Wireless products (Wi-Fi, Bluetooth) additionally need radio approval under the Radio Law — often called TELEC or Giteki certification.

Can my Chinese supplier get PSE certification on their own?

Not in a way that covers you. The certification and the business notification are tied to the notifying supplier — the entity importing or manufacturing in Japan. A Chinese factory can supply test reports and cooperate with an RCAB, and for diamond PSE the certificate names the factory, but the license holder must be a Japanese company. If a supplier shows you a "PSE certificate" in their name only, verify which products it covers and whether the RCAB named is METI-registered.

How do I verify a PSE certificate a supplier sends me?

For diamond PSE products, the label must name the registered conformity assessment body — check that the body is on METI's RCAB list. Ask for the certificate of conformity per model, confirm the factory named on it is the one producing your goods, and confirm the model numbers match. For circle PSE products, ask for the underlying test reports against the applicable JIS standards rather than a decorative certificate.

Does the PSE mark expire?

Certificate validity for diamond PSE products is 3, 5, or 7 years depending on the product classification, after which re-certification is needed. For circle PSE products the period is generally 3 years. Any specification change to a certified product means the certification no longer covers it, regardless of the calendar.

Is CE or FCC certification accepted in Japan instead of PSE?

No. PSE is a Japanese legal requirement under the DENAN Law; CE or FCC marks have no legal standing in Japan for electrical safety. Test data from CE/FCC programs can sometimes reduce duplicate testing (IEC-based CB reports with Japanese deviations especially), but the product still needs the PSE mark and the importer's METI notification.

Do I need PSE certification if I only sell on Amazon Japan?

Yes, if the product is a regulated electrical appliance. Amazon Japan and other marketplaces routinely request proof of PSE compliance before approving listings for electrical products. Selling through a marketplace does not exempt you from the DENAN Law — you are still the importer placing the product on the Japanese market.

Your decision rule: the next three moves

If you're sourcing electronics from China for Japan, run this sequence before you commit to a factory. First, classify the product against METI's designated lists — diamond or circle PSE — because this single decision sets the budget and timeline. Second, confirm you have a Japanese entity or partner ready to act as the notifying supplier, since no lab certifies a product with nowhere to issue the license. Third, get the factory's technical documentation before samples ship to the lab, and lock specifications so the tested sample matches production.

Get those three steps right and PSE certification becomes a predictable line item: four to eight weeks for diamond, two to four for circle, with costs that scale per model rather than per surprise. Skip them, and the likely outcome is a detained shipment and a redesign.

For help on the factory side — vetting suppliers for PSE testing, collecting technical files, coordinating the RCAB inspection — write to hi@cnally.com or see our pricing.