Importing dangerous goods (DG) into Japan requires clearing two separate regulatory layers at once: international transport compliance (IATA for air, IMDG for sea) that governs the carrier, and Japan-specific statutes such as the High Pressure Gas Safety Act (高圧ガス保安法) and the Poisonous and Deleterious Substances Control Act (毒物及び劇物取締法) that govern the importer directly. The importer of record bears full legal responsibility for correct classification and documentation; a gap in either layer stops the shipment before it reaches Japan Customs (関税法).
Why Does DG Import Into Japan Require Separate Planning From Ordinary Cargo?#
Because the importer of record, not the shipper or forwarder, carries the legal exposure for correct classification, documentation, and customs presentation. A non-compliant declaration halts the shipment at the carrier stage, before it ever reaches Japan Customs.
The regulatory stack: DG shipments operate under multiple overlapping frameworks simultaneously. International transport regulations (IATA or IMDG depending on mode) govern the carrier. Japan-specific statutes govern the importer. A gap in either layer is a customs hold. For a lithium-battery shipment specifically, this stack combines with the IOR structure that holds import liability, since the party named on the import declaration is the party exposed if the DG paperwork does not match the cargo.
What Counts as Dangerous Goods?#
"Dangerous goods" is formally defined by the UN Recommendations on the Transport of Dangerous Goods (the UN "Orange Book"), implemented in:
- Air transport: IATA Dangerous Goods Regulations (DGR) - current annual edition
- Sea transport: IMDG Code - current amendment cycle (updated every two years)
Japan Customs applies these international classifications at import, alongside Japan-specific statutes that impose additional requirements beyond transport compliance.
The 9 DG Classes
| Class | Category | Common Import Examples |
|---|---|---|
| 1 | Explosives | Fireworks, detonators, airbag inflators |
| 2 | Gases | Compressed aerosols, helium, nitrogen, propane |
| 3 | Flammable liquids | Solvents, adhesives, paints, alcohols |
| 4 | Flammable solids / pyrophoric / self-heating | Metal powders, charcoal briquettes |
| 5 | Oxidizers and organic peroxides | Bleach, hydrogen peroxide |
| 6 | Toxic and infectious substances | Pesticides, medical diagnostic specimens |
| 7 | Radioactive material | Medical isotopes, radiation measurement devices |
| 8 | Corrosives | Acids, caustic soda, lead-acid batteries |
| 9 | Miscellaneous dangerous substances | Lithium batteries, dry ice, magnetized articles |
📌 For technology and electronics imports, Class 9 is the dominant DG category. Lithium batteries are present in the vast majority of modern electronic devices, from consumer gadgets to industrial sensors, and are among the most frequently mishandled items in Japan import compliance.
Which UN Number Applies to a Lithium Battery Shipment?#
The UN number depends on chemistry (lithium-ion vs. lithium metal) and packaging (standalone cell vs. packed with or contained in equipment), never on size, voltage, or application. Lithium batteries trigger more Japan import compliance problems than any other Class 9 item because this four-way distinction is frequently misapplied. A dedicated walkthrough of the customs and IOR side of battery imports is in the Japan IOR guide for lithium battery shipments.
Four UN Numbers - Not Interchangeable
| UN Number | Battery Type | Condition | Transport Modes |
|---|---|---|---|
| UN 3090 | Lithium metal (primary/non-rechargeable) | Standalone | IATA + IMDG |
| UN 3091 | Lithium metal (primary/non-rechargeable) | Packed with or contained in equipment | IATA + IMDG |
| UN 3480 | Lithium-ion (rechargeable) | Standalone | IATA + IMDG |
| UN 3481 | Lithium-ion (rechargeable) | Packed with or contained in equipment | IATA + IMDG |
The critical distinction is chemistry, not size, voltage, or application.
Is the battery rechargeable?
│
┌─────┴───────┐
Yes No
│ │
▼ ▼
Lithium-ion Lithium metal
(rechargeable) (primary, non-rechargeable)
│ │
├──Standalone──→ UN 3480 ├──Standalone──→ UN 3090
└──In equipment→ UN 3481 └──In equipment→ UN 3091
⚠️ Always confirm chemistry from the manufacturer's technical data sheet. Field identification (by shape, size, or assumed use) is not sufficient for DG classification purposes and will not hold up in a carrier or customs query.
Why Getting This Wrong Matters for Japan Import
| Declaration Error | Consequence |
|---|---|
| No DG declaration for Li battery shipment | Carrier rejection at origin; customs hold at Japan port |
| Wrong UN number declared | IATA/IMDG non-compliance; carrier liability exposure; Japan Customs query |
| Missing DG declaration on air waybill | Potential off-load by carrier before departure |
| Standalone cells shipped above 30% state of charge (IATA air) | IATA Section 2.9.4 violation; carrier refusal |
| HS code does not match DG classification (Li-ion coded as alkaline) | Misclassification exposure in post-clearance audit |
HS Code Cross-Reference for Lithium Batteries
The HS code in the customs declaration must be consistent with the DG classification in the transport documents. Where the correct heading is genuinely in doubt, particularly for battery packs bundled with equipment, our HS code classification guide covers how to resolve the classification before filing rather than after a post-clearance audit query.
| Battery Type | UN Number | Correct HS Code |
|---|---|---|
| Rechargeable lithium-ion | UN 3480 / UN 3481 | 8507.60 |
| Non-rechargeable (primary) lithium | UN 3090 / UN 3091 | 8506.50 |
| Alkaline MnO₂ | Not DG | 8506.10 |
Safety Data Sheets - Japan's JIS Z 7253 Requirement#
A Safety Data Sheet (SDS) is mandatory for import and commercial handling of any substance classified as hazardous under Japan's GHS implementation. The SDS must be provided in Japanese and formatted to JIS Z 7253, Japan's national standard for GHS-compliant SDS. This is not optional and is not satisfied by a translated foreign-format SDS.
Why Simple Translation Is Not Enough
A European REACH Annex II SDS or a US HazCom 2012 SDS translated into Japanese does not meet JIS Z 7253 requirements. Japan's national standard differs in section ordering, required hazard statement codes, and the specific GHS classification criteria applied. Full regulatory reformatting is required, not just translation.
JIS Z 7253: All 16 Sections Required
| Section | Content |
|---|---|
| 1 | Chemical product name and supplier details |
| 2 | Hazard identification (GHS classification, signal words, hazard/precautionary statements) |
| 3 | Composition and information on ingredients |
| 4 | First-aid measures |
| 5 | Fire-fighting measures |
| 6 | Accidental release measures |
| 7 | Handling and storage |
| 8 | Exposure controls and personal protection |
| 9 | Physical and chemical properties |
| 10 | Stability and reactivity |
| 11 | Toxicological information |
| 12 | Ecological information |
| 13 | Disposal considerations |
| 14 | Transport information (UN number, DG class, packing group, ERG number) |
| 15 | Regulatory information (Japan-specific: applicable laws, applicable limits) |
| 16 | Other information (SDS preparation date, revision history) |
SDS Scope by Product Type
| Product Type | SDS Type | Additional Requirement |
|---|---|---|
| General chemical substance | Standard GHS / JIS Z 7253 | Full 16-section format in Japanese |
| Lithium-ion battery (UN 3480/3481) | Battery SDS | UN transport classification in Section 14 |
| Lithium metal battery (UN 3090/3091) | Battery SDS | Confirmed chemistry distinction from Li-ion |
| Compressed gas cylinder | Pressure vessel SDS | 高圧ガス保安法 review required separately |
| Toxic / deleterious substance | 毒劇物 SDS | 毒物及び劇物取締法 import notification required |
📌 Handling obligation: Under Japanese law, workplaces that use or store hazardous substances must have the Japanese-language SDS accessible to all handlers at all storage and distribution locations. This obligation does not end at customs clearance - it continues through the supply chain.
Does the High Pressure Gas Safety Act Apply Separately From IATA and IMDG?#
Yes. Compressed gas imports in Japan operate under the High Pressure Gas Safety Act (高圧ガス保安法), a statute entirely separate from IATA DGR and IMDG transport regulations, with its own permit and facility requirements.
| Requirement | Detail |
|---|---|
| Import permit or notification | Required in most cases before customs clearance proceeds |
| Cargo segregation | Compressed gas shipments cannot be commingled with standard cargo |
| Cannot rely on SDS alone | 高圧ガス保安法 has independent documentation and permit requirements |
| Facility requirements | Storage facilities in Japan must meet statutory safety standards |
| Common example | Compressed helium: IMDG Class 2.2, UN 1046 |
⚠️ The 高圧ガス保安法 permit or notification process must be completed before the shipment arrives at the Japan port of entry. Arriving without the permit in place means the goods cannot be released from customs - storage charges accrue immediately.
What Other Japan-Specific Statutes Apply to DG Imports?#
Beyond IATA/IMDG and 高圧ガス保安法, several other Japan statutes impose obligations at import, and flammable-liquid importers additionally need to check local Fire Services Act (消防法) storage permits, covered separately in our Fire Services Act flammable liquids guide:
| Statute | Authority | Trigger |
|---|---|---|
| 毒物及び劇物取締法 (Poisonous and Deleterious Substances Control Act) | MHLW | Import notification required for substances on the 毒物 (toxic) or 劇物 (deleterious) lists |
| 化審法 (Chemical Substances Examination Act) | METI/MHLW/MoE | New chemical substances or substances not on Japan's existing chemical inventory require notification or registration before import |
| 農薬取締法 (Agricultural Chemicals Regulation Act) | MAFF | Pesticide imports require registration; many substances are banned outright |
| 食品衛生法 (Food Sanitation Act) | MHLW | Chemicals intended for food-contact applications require MHLW import notification and compliance with positive lists |
Where a DG shipment also carries a PSE electrical-safety trigger (batteries built into consumer devices, for example), that layer runs on its own track as well; see our PSE certification and Notifying Supplier guide for how the two compliance tracks fit together. Non-resident importers coordinating DG shipments without a Japan entity typically run this through an ACP or IOR arrangement, since the DG declaration and the customs declaration have to reconcile under the same importer of record.
DG Import Compliance: Process Flow#
Step 1: Classify
Determine DG class, UN number, packing group, transport category,
and state of charge (for lithium batteries).
│
Step 2: Document
Prepare: JIS Z 7253-format SDS (Japanese), DG shipper's declaration,
transport documents with DG notation (Air Waybill or Bill of Lading).
│
Step 3: Check Japan-specific statutes
High pressure gas? → 高圧ガス保安法 permit/notification before arrival
Toxic/deleterious? → 毒物及び劇物取締法 import notification
New chemical substance? → 化審法 inventory check and pre-import assessment
│
Step 4: Coordinate with carrier
Confirm carrier acceptance (IATA or IMDG compliance confirmation).
Air: Section 2 restrictions for lithium batteries.
Sea: IMDG stowage and segregation requirements.
│
Step 5: Customs declaration
Import declaration via NACCS with correct HS code.
HS code must be consistent with DG documentation.
ACP or IOR coordinates with customs broker.
│
Step 6: Post-clearance handling
Japanese-language SDS accessible at all storage/distribution locations.
Record-keeping obligations apply for specified periods under each statute.
Key Regulatory Reference Table#
| Framework / Statute | Authority | Scope in Japan DG Import Context |
|---|---|---|
| IATA DGR (current edition) | IATA | Air transport classification, documentation, and quantity limits |
| IMDG Code (current amendment) | IMO | Sea transport classification, stowage, and segregation |
| JIS Z 7253 | JSA / METI | Japanese-format SDS - mandatory for all hazardous substances |
| 高圧ガス保安法 | METI | Compressed gas import permit/notification and storage |
| 毒物及び劇物取締法 | MHLW | Import notification for toxic and deleterious substances |
| 化審法 | METI/MHLW/MoE | Chemical substance inventory and new substance registration |
| 関税法 | MOF / Japan Customs | Import declaration and HS classification |
DG Import Compliance Checklist#
- Confirm DG class and UN number from manufacturer technical data sheet (not assumption)
- Identify transport mode: air (IATA DGR) or sea (IMDG) - different regulations and quantity limits
- For lithium batteries: confirm chemistry (rechargeable vs. primary), assign correct UN number
- Check state of charge compliance for air shipment (standalone cells: ≤30% per IATA)
- Prepare Japanese-format SDS per JIS Z 7253 (not just translation of a foreign SDS)
- For compressed gas: obtain 高圧ガス保安法 permit or file notification before vessel/aircraft arrival
- For toxic/deleterious substances: complete 毒劇物 import notification
- For new or unregistered chemical substances: run 化審法 inventory check
- Verify HS code is consistent with DG classification (8507.60 for Li-ion, 8506.50 for primary Li)
- Confirm ACP or IOR is briefed on DG nature of goods before customs declaration is filed
- Ensure DG shipper's declaration is completed by a trained and authorised shipper
- Confirm Japanese-language SDS is accessible at all Japan storage and distribution locations
Official References#
| Source | Link |
|---|---|
| IATA - Dangerous Goods Regulations | iata.org/dgr |
| IMO - IMDG Code | imo.org |
| Japan Customs - Import Compliance | customs.go.jp/english |
| METI - High Pressure Gas Safety Act | meti.go.jp |
| MHLW - Poisonous and Deleterious Substances | mhlw.go.jp |
| NITE - Chemical Management (CSCL / 化審法) | nite.go.jp/en |
| JSA - JIS Z 7253 Standard | jisc.go.jp |
| Japan Customs - Advance Classification Rulings | customs.go.jp |
Frequently Asked Questions#
Do I need a Japanese-format SDS if I already have one in English or another GHS format?
Yes. Japan requires a Safety Data Sheet formatted to JIS Z 7253, its national GHS standard, and a translated foreign-format SDS (such as a REACH Annex II or HazCom 2012 sheet) does not satisfy this because section ordering, hazard statement codes, and classification criteria differ. Full regulatory reformatting into JIS Z 7253's 16-section structure is required, not just translation.
Can my freight forwarder handle dangerous goods compliance for me?
The forwarder or carrier confirms transport-mode compliance (IATA or IMDG), but the importer of record carries the legal responsibility for classification accuracy, Japan-specific permits, and customs presentation. A forwarder flagging a packaging issue does not substitute for the importer's own DG classification review, especially where a High Pressure Gas Safety Act permit or a toxic-substance notification is required before the shipment arrives.
What happens if my HS code does not match my DG classification?
A mismatch, such as a lithium-ion battery coded under an alkaline HS heading, is a misclassification that surfaces readily in a Japan Customs post-clearance audit and can trigger duty reassessment and penalty exposure under the Customs Act (関税法). Confirming the HS code against the DG classification before the first shipment, rather than after a query, is the lower-cost sequence.
Conclusion#
Dangerous goods import into Japan runs on two tracks that must reconcile: international transport classification and Japan's own statutory permits and notifications. Confirming chemistry-based UN numbers, preparing a genuine JIS Z 7253 SDS, and clearing any high-pressure-gas, toxic-substance, or fire-services permit before the shipment departs keeps both tracks aligned and avoids a customs hold on arrival.
This article is informational only and does not constitute legal, regulatory, or safety advice. Consult a certified customs specialist (通関士), licensed safety officer, chemical management specialist, or attorney (弁護士) for your specific dangerous goods classification and import compliance requirements. Last updated: August 2026.