No. PSE certification under Japan's Electrical Appliance and Material Safety Act (電気用品安全法) is not organized around the individual SKU. It runs on three separate units: a type-classification group (型式区分) covering models that share identical rated parameters, a broader appliance category used for METI's Notifying Supplier (届出事業者) filing, and the individual product, which still needs its own PSE mark. Whether your SKUs can share one certificate depends on those parameters, not on your marketing lineup.
What are the three units PSE compliance is actually organized around?
PSE compliance runs on three distinct units, and confusing them is the single most common source of over-quoting or under-scoping in a multi-SKU project. The conformity unit, the notification unit, and the marking unit answer three different questions, and only one of them is priced per SKU. Understanding which is which determines whether a ten-model product line needs ten certificates or one.
The conformity or testing unit is the 型式区分 (type classification): the governing METI ministerial ordinance (省令) for that appliance category defines which parameters, such as rated voltage, rated power, structure, and materials, create a new type when they differ. The business notification unit is the 電気用品の区分 (electrical appliance category), a broader grouping prescribed in the enforcement regulations (施行規則) that governs the Notifying Supplier filing to METI, and one category can span many product types. The marking unit is the individual product itself: whatever the certification grouping looks like upstream, every unit placed on the Japan market carries its own PSE mark. Our primer on the Notifying Supplier model covers how the 届出事業者 registration itself works once a category is established.
Can multiple SKUs share one PSE certificate?
Yes, when the SKUs fall under the same 型式区分, meaning they share every parameter the ordinance defines as significant for that appliance type. A color variant of the same rated-wattage device typically stays inside the same type group, because color is not among the defined parameters. A wattage change, a voltage change, or a structural change to the internal components creates a new 型式区分, because those are exactly the parameters the ordinance is built around, and the two SKUs then need separate conformity work even if they share the same enclosure and branding.
This is why "do I need a certificate per model" is the wrong question to lead a budget conversation with. The right question is which of your SKUs share identical rated parameters as defined in the appliance-specific ordinance, because that boundary, not your product catalog, decides where one certification effort ends and the next begins. Our Diamond PSE vs Circle PSE guide walks through how the specified/non-specified split itself is determined before grouping even becomes relevant.
Does the certificate differ for Diamond PSE versus Circle PSE?
Yes, the form of the certificate and who issues it changes by category, but the grouping logic (per 型式区分, not per SKU) applies to both. For Diamond PSE (特定電気用品, the higher-risk specified category), a registered conformity assessment body (登録検査機関, RCAB) issues a 適合性検査証明書 (conformity inspection certificate) per 型式区分, and the Notifying Supplier must retain that certificate under the Electrical Appliance and Material Safety Act (電気用品安全法) Article 9. One certificate can therefore cover an entire family of models, provided they sit inside the same type group.
For Circle PSE (the non-specified category), there is no third-party government certificate at all: the basis is self-declaration (自主検査). Where the factory holds a valid IECEE CB Test Certificate or Report, that report can cover the entire 型式区分 family through the shortcut path, which is often faster and less expensive than the full lab-testing route. Either way, the certificate attaches to the type group; it is the label and the mark that attach to each physical unit.
Does METI filing also happen per SKU, or per category?
METI filing happens per 電気用品の区分 (electrical appliance category), which is a broader grouping than the 型式区分 used for conformity testing. A single category filing can cover many product types at once, which is precisely why Notifying Supplier registration and its annual maintenance are priced per category rather than per model. A manufacturer with several appliance families under one Notifying Supplier registration is not re-filing from scratch for each new SKU added within an already-registered category; the addition is managed against the existing registration rather than treated as a new business notification.
This is also where cost planning tends to go wrong in the other direction: a buyer who assumes low SKU-level certification cost sometimes overlooks that Notifying Supplier annual maintenance, technical documentation record-keeping, and audit coordination continue for as long as the Notifying Supplier's name stays on the label, independent of how the certification itself was grouped. Aplash's own guide to China-sourced electronics under the Notifying Supplier model covers what changes when the factory of record sits outside Japan and cannot itself hold the registration.
What determines whether grouping actually reduces your certification cost?
The 型式区分 boundary for the specific appliance type, checked against the governing ministerial ordinance's appendix (省令別表), determines it, and that boundary must be confirmed before it is relied on in a quote. Grouping potential varies by appliance category: some categories define very few significant parameters, so a wide product line collapses into one or two type groups, while others define parameters narrowly enough that near-identical-looking SKUs still fall into separate groups. There is no shortcut to this determination that skips the product-specific ordinance appendix.
This is the reason a PSE Applicability Assessment happens before, not after, a certification quote is issued: the assessment identifies whether the appliance is Diamond or Circle, and separately, which of the client's SKUs the ordinance's defined parameters place in the same 型式区分. Skipping that step and quoting per SKU when parameters actually overlap wastes budget; assuming grouping is automatic when parameters actually differ creates an uncertified product on the market. Aplash structures PSE and Notifying Supplier engagements around confirming this boundary before committing to a certification or filing plan.
Key points:
(a) Conformity testing groups by 型式区分 (type classification): SKUs sharing every parameter the appliance-specific ordinance defines as significant can share one Diamond conformity certificate or one Circle self-declaration dossier.
(b) METI notification groups by the broader 電気用品の区分 (electrical appliance category), which is why Notifying Supplier registration and its annual maintenance are priced and billed per category rather than per SKU.
(c) The PSE mark itself is never grouped: it is affixed to every individual unit placed on the market, regardless of how the certification and filing were consolidated upstream.
Frequently Asked Questions
If two of my SKUs are the same product in different colors, do I need two PSE certificates?
Generally no, provided color is not one of the parameters the governing ministerial ordinance defines as significant for that appliance type, in which case both SKUs fall under the same 型式区分 and share one certificate. Rated voltage, rated power, structure, and materials are the categories of parameter that typically matter; color usually is not. Confirm this against the specific appliance's ordinance appendix rather than assuming it, since the defined parameters differ by product type.
Does adding a new wattage variant to an already-certified product line require a whole new Notifying Supplier registration?
No, the Notifying Supplier registration is filed per broader appliance category and typically already covers the new variant's product type, but the new wattage figure likely creates a new 型式区分 requiring its own conformity work. The registration itself does not need to be refiled from scratch; the certification for that specific variant does. These are two separate questions with two separate answers, which is exactly the distinction that gets missed in DIY compliance planning.
Can I get one PSE certificate that covers an entire multi-SKU product family to reduce cost?
Potentially, but only for the SKUs that actually share identical rated parameters as defined by the ordinance for that appliance type, and this must be confirmed during a PSE Applicability Assessment rather than assumed before quoting. Some product families collapse into one or two type groups; others do not, depending on how the ordinance defines significant parameters for that category. Treating grouping as automatic before verification risks either an inflated quote or an unverified compliance gap.
Conclusion
The recurring SKU-count question has a structural answer rather than a numeric one: certification groups by 型式区分, filing groups by the broader appliance category, and marking never groups at all. Cost savings from grouping are real but conditional on the specific parameters the ordinance defines for that appliance type, and that boundary has to be verified product by product before it is built into a budget.
This article is informational only and does not constitute legal, tax, or regulatory advice. Consult a qualified advisor before acting on the content. Last updated: August 2026.