Generally no. Battery-powered measuring instruments such as handheld multimeters and clamp meters are not enumerated in the Electrical Appliance and Material Safety Act's (電気用品安全法, DENAN Act) closed list of regulated products, so the instrument itself falls outside PSE certification. The exemption has two real limits: mains-fed bench instruments and any AC adapter or charging cradle bundled with the unit, which is commonly still regulated on its own.
Do Multimeters and Clamp Meters Need PSE Certification in Japan?#
No, as a general rule. PSE certification under the Electrical Appliance and Material Safety Act (電気用品安全法, DENAN Act) applies only to products enumerated on a closed list, and general-purpose or industrial measuring instruments (計測器) are not on it.
That list is not a description of "electrical products broadly." It is a fixed inventory: Appended Table 1 (別表第一) and Appended Table 2 (別表第二), together covering 457 named items, split between 116 Specified Electrical Appliances (特定電気用品, Diamond PSE) and 341 Non-Specified Electrical Appliances (Circle PSE). METI's own interpretive guidance on scope (対象非対象解釈例) treats general-purpose and industrial measuring instruments as falling outside this list, because DENAN's reach is defined around appliances that form part of, or connect as a load to, a general electrical installation (一般用電気工作物), not around instruments that read a value off a circuit. A clamp meter measuring current on someone else's installation is not itself part of that installation. Background on how the same closed-list logic plays out for products that are enumerated is covered in PSE Certification for Foreign Manufacturers - DENAN and the Notifying Supplier Model.
That does not make the exemption automatic paperwork-free. The burden of demonstrating non-applicability sits with the importer, not with METI, so the practical output is a written Applicability Assessment documenting why the specific model falls outside Appended Table 1 and Appended Table 2 (別表第一, 別表第二) before it clears customs.
When Does a Measuring Instrument Lose the DENAN Exemption?#
A mains-fed bench instrument loses the blanket measuring-instrument exemption the moment it plugs into AC 100V or 200V rather than running on its own battery. An insulation tester, a power analyser, or a bench-top power supply with a mains cord connects directly to a general electrical installation (一般用電気工作物) in the same way a household appliance does, which is exactly the boundary DENAN is built around.
For that category the analysis reverts to a normal, model-by-model classification exercise against the Appended Tables (別表) rather than resting on the general "measuring instruments are out of scope" position. Two identical-looking instruments, one battery-only, one with a mains-fed variant in the same product line, can land in different regulatory positions. This is a common miss in MRO and industrial-tool shipments that group a whole catalog under a single "test equipment, exempt" assumption.
Does the AC Adapter or Charging Cradle Still Need PSE?#
Yes, very often. Even when the meter itself is correctly exempt, an AC adapter or charging cradle shipped alongside it is commonly still Diamond PSE regulated on its own, because METI's designated list specifies power supply adapters as a DC power supply device (直流電源装置), one of the 116 Specified Electrical Appliances.
This is the single most commonly missed PSE exposure hidden inside an otherwise-compliant shipment. An importer checks the instrument, confirms it is off the list, and stops there, without separately checking the wall adapter or charging dock packed in the same box. The adapter is a distinct article for DENAN purposes and does not inherit the instrument's exempt status. The same logic applies across other product categories where an accessory power supply rides along with an otherwise-exempt device; see Do You Need PSE, PSC, or Food Safety Certification to Import Into Japan? (2026 Guide) for how PSE, PSC, and food-safety triggers get separated line by line in a mixed shipment.
A growing share of clamp meters and multimeters also carry Bluetooth for app-based logging. That is a separate compliance question from PSE and runs through the Radio Act (電波法) and Technical Conformity (技適) marking rather than DENAN. PSE and Giteki in Japan: Do Wireless Devices Need Both? and Does Your Wireless Device Need 技適 Certification to Import Into Japan? cover that determination in detail; it does not change the DENAN analysis above, but it is worth checking on the same product spec sheet.
Key points:
(a) A battery-powered handheld multimeter or clamp meter is generally exempt from PSE certification because measuring instruments (計測器) are not enumerated in DENAN's 457-item Appended Tables (別表第一, 別表第二). (b) A mains-fed bench instrument (insulation tester, power analyser, bench supply) defeats that exemption and needs a model-by-model check against the Appended Tables (別表). (c) An AC adapter or charging cradle bundled with the instrument is frequently regulated as Diamond PSE in its own right, specified as a DC power supply device (直流電源装置), independent of the instrument's own status.
Is a Multimeter Regulated Under the Measurement Act (計量法) Instead?#
Usually not, but this is the regime people most often confuse PSE with. The Measurement Act (計量法) governs Specified Measuring Instruments (特定計量器), a closed set of 18 categories covering instruments used for commercial transaction (取引) or certification (証明), such as watt-hour meters (電力量計), taxi meters (タクシーメーター), and non-automatic scales (非自動はかり).
A handheld multimeter or clamp meter read by a technician during maintenance or troubleshooting work is neither a commercial-transaction use nor a certification use. It is a diagnostic reading consumed internally by the person taking it, not a value that determines a billed amount or a certified fact for a third party. That means no verification/calibration certification (検定) obligation arises under the Measurement Act for that use case, which is a separate and independent conclusion from the DENAN analysis above; a product can clear both regimes for entirely different reasons.
Where a unit genuinely is an electric meter (電気計器) used to bill a customer or certify a measurement for legal or contractual purposes, the verification process (検定) runs through the Japan Electric Meters Inspection Corporation (日本電気計器検定所), not the prefectural Weights and Measures Inspection Office (計量検定所) that handles most other Specified Measuring Instrument categories. That distinction matters for anyone importing metering hardware that will sit downstream of a utility billing point rather than a technician's toolbox.
Once the classification question is settled, whether the instrument is exempt outright, requires a mains-fed model check, or needs the adapter handled separately, the next question is usually how the shipment itself clears customs. That structural question, and who is named as the importer of record on the declaration, is covered under Attorney for Customs Procedures.
Frequently Asked Questions#
Does a handheld multimeter need a PSE mark to be sold in a Japanese retail store?
Generally no, provided it is battery-powered and does not fall into a bundled AC adapter or charging cradle that is itself regulated. A retailer or importer should still hold a written Applicability Assessment documenting why the specific model falls outside DENAN's Appended Tables (別表第一, 別表第二), because the burden of proving non-applicability sits with the importer, not the retailer or METI.
If my clamp meter ships with a USB charging cable and wall adapter, does the whole kit need PSE?
Not the whole kit as a single unit. The meter itself is typically exempt, but the wall adapter is commonly classified as a DC power supply device (直流電源装置) under Diamond PSE, meaning it falls under Specified Electrical Appliances (特定電気用品), and needs to be assessed and certified separately from the instrument, even though they ship in the same box.
Is calibration required under the Measurement Act before I can sell a multimeter in Japan?
No, not for a general-purpose multimeter or clamp meter used for field diagnostics or maintenance work, because that use is neither a commercial transaction (取引) nor a certification (証明) use under the Measurement Act's Specified Measuring Instrument (特定計量器) regime. Verification obligations (検定) attach to a narrower set of instruments, such as watt-hour meters or non-automatic scales, used to determine a billed amount or a certified value for a third party.
Conclusion#
The exemption for measuring instruments under the DENAN Act is real but narrow: it covers the battery-powered instrument itself, not a mains-fed variant of the same product line and not a bundled power adapter. The Measurement Act runs on a separate and independent logic keyed to transaction or certification use, which most field test equipment never triggers. Confirming both, and documenting the reasoning for the file, is what turns "probably exempt" into a defensible import position.
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: September 2026.