The signatory of a Dangerous Goods Declaration (DGD) carries full legal responsibility for that shipment's regulatory conformity and must hold current IATA/ICAO dangerous goods training certification. Under Japan's Civil Aeronautics Act (航空法), that duty sits on the shipper (荷送人), the party who packs, classifies, marks, labels, and declares the goods, not on whichever party happens to hand the box to a carrier.
Who Signs the Dangerous Goods Declaration for a Shipment Out of Japan?
Whoever signs must currently hold IATA or ICAO dangerous goods training certification, and that person takes on full legal responsibility for the shipment's regulatory conformity. This is not a formality. The signature attests that the goods have been correctly classified against the applicable UN number, packed to the matching packing instruction, marked, labelled, and documented in accordance with the IATA Dangerous Goods Regulations for air or the IMDG Code for sea.
In practice the signatory is one of three parties: the shipper's own certified staff, the freight forwarder's certified staff, or, where neither holds current certification, a party engaged to confirm compliance before anyone signs. Certification lapses. A person who trained two years ago and never recertified is not qualified to sign, regardless of job title or years of experience in the role. If you are shipping lithium batteries, compressed gas, or classified chemicals from Japan and are not certain who on your team currently holds a valid certificate, that question needs an answer before the shipment moves, not after a carrier rejects the paperwork.
What Does Japan's Civil Aeronautics Act Say About Shipper Liability?
The Civil Aeronautics Act (航空法) places compliance duty, employee training duty, prohibited-goods confirmation duty, and the duty to get classification, packing, marking, labelling and declaration right, squarely on the shipper (荷送人). It does not distribute that duty across the carrier, the forwarder, or the customs broker by default. The shipper bears it, and the law backs that allocation with a penalty: reported non-compliant carriage exposure runs up to JPY 500,000.
That figure is worth sitting with. It is not the cost of a paperwork correction; it is the exposure for having gotten the declaration wrong in the first place, which is exactly why the training certification requirement exists as a gate rather than a suggestion. A shipper who has never handled dangerous goods air freight before, and is now moving lithium-ion cells for the first time, is the profile most likely to discover this the hard way. The Act's framework applies whether the goods are travelling under UN 3480/3481 lithium-ion classification, a Class 9 lithium metal number, or a compressed gas entry; the general DG classification and import process determines which packing instruction and which training scope applies, but the liability allocation under the Civil Aeronautics Act (航空法) does not change by class.
Key points:
(a) The DGD signatory, not the shipping company as an entity, carries personal legal responsibility for the declaration's accuracy and must hold current IATA/ICAO certification at the moment of signing. (b) Japan's Civil Aeronautics Act (航空法) assigns compliance, training, prohibited-goods confirmation, and correct classification, packing, marking, labelling and declaration duties to the shipper (荷送人), with a reported JPY 500,000 ceiling for non-compliant carriage. (c) The transport-mode framework (IATA Dangerous Goods Regulations for air, IMDG Code for sea) and Japan Customs (関税法) clearance sit on separate legal layers: getting the DGD right under the Civil Aeronautics Act does not substitute for correct customs classification, and vice versa.
Who Reviews the DGD Paperwork Before a Shipment Moves?
Aplash reviews the dangerous goods paperwork ahead of signature to confirm the classification, packing, and documentation are correct and that the intended signatory's certification is current. Where the shipper's own certified staff or the forwarder's certified staff holds valid IATA/ICAO certification, that party signs the declaration; the review confirms it is safe for them to do so. Where neither party currently holds valid certification, Aplash confirms certification status before anyone signs, closing the gap rather than letting an uncertified signature go out the door.
This division of labour matters because certification status is not always obvious to the people arranging the shipment. A forwarder's operations staff may have handled dangerous goods files for years without personally holding a current certificate; a shipper's export team may have certification that expired mid-year without anyone flagging it. The review step exists precisely to catch that before it becomes a liability event rather than after. It runs alongside, not instead of, other DG-specific compliance steps such as SDS localisation to JIS Z 7253 or a Fire Services Act storage permit for flammable liquids, each of which is a separate regulatory obligation layered on top of, not a substitute for, the declaration itself.
Does the International Transport Framework or Japan Customs Govern the Declaration?
Neither governs it alone; they are two distinct layers and both apply. The IATA Dangerous Goods Regulations (air) and the IMDG Code (sea) are the transport-mode frameworks that set classification, packing instruction, marking, labelling, and documentation standards for the physical movement of the goods, and it is against these frameworks that the DGD signatory's certification and the declaration's accuracy are measured.
Japan Customs (関税法) sits downstream of that and governs a separate question: whether the goods clear import formalities correctly, including tariff classification and any import permit or notification requirement, such as the high-pressure gas notification that applies to compressed gas shipments. A DGD that is perfectly correct under IATA or IMDG rules does not answer the customs classification question, and a correct customs entry does not answer whether the dangerous goods declaration was properly signed. Both layers require separate, correct handling, and treating one as a proxy for the other is the most common source of DG shipment delay.
Frequently Asked Questions
Can a customs broker sign the dangerous goods declaration instead of the shipper?
A customs broker's role is customs clearance under Japan Customs (関税法), a separate function from the dangerous goods declaration under the Civil Aeronautics Act (航空法). The DGD must be signed by whoever holds current IATA/ICAO dangerous goods training certification, whether that is the shipper's own staff or the forwarder's staff; a customs broker's clearance authority does not itself confer DG signatory standing.
What happens if the person who signs the DGD does not have current certification?
Signing without current IATA/ICAO certification exposes the signatory and the shipment to liability under the Civil Aeronautics Act (航空法), which carries a reported penalty ceiling of JPY 500,000 for non-compliant carriage, separate from any carrier rejection or delay the uncertified paperwork triggers at acceptance. The fix is to confirm certification status before the declaration is prepared, not after a carrier or ground handler flags it.
Does the DGD requirement change for lithium battery shipments versus other dangerous goods?
The signatory requirement, current IATA/ICAO certification and full legal responsibility for accuracy, does not change by dangerous goods class. What changes is the classification and packing instruction feeding into the declaration: lithium-ion cells under UN 3480/3481 and lithium metal under UN 3090/3091 each carry class-specific packing and marking rules that the certified signatory must apply correctly before signing.
Conclusion
The dangerous goods declaration is a personal-liability document, not paperwork routed to whoever is administratively closest to the shipment. Japan's Civil Aeronautics Act (航空法) fixes that liability on the shipper (荷送人) and backs it with a reported penalty, and the only party who should sign is whoever currently holds valid IATA/ICAO certification. Confirming that before signature, not after a rejection, is the difference between a routine dangerous goods shipment and a compliance exposure.
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.