Air Cargo Casket Requirements for Transporting Remains from Thailand to Japan

IATA Classification and Why Families Cannot Book Directly

International airlines classify non-cremated human remains as "HUM" cargo under IATA Dangerous Goods regulations (Category 6.2). HUM cargo can only be booked by a licensed funeral director holding verified "Known Shipper" status with the relevant aviation security authorities.

Families cannot walk into a cargo terminal and book a shipment. The funeral director acts as the intermediary — preparing the remains, constructing the casket assembly, completing the Air Waybill, and coordinating with airline cargo departments. This is one reason why having a funeral director with experience in the Thailand-Japan corridor matters: the paperwork requirements differ from domestic cargo, and a rejected shipment means starting the booking process over.

The Casket Construction Standard

International transport of remains follows the Berlin and Strasbourg Agreements on the Conveyance of Corpses. The casket assembly is built in layers:

Layer 1: Polythene wrapping. Two layers of thick, transparent polythene wrap the remains directly, creating a sealed biological barrier.

Layer 2: Hermetically sealed metal liner. A zinc, lead, bronze, or steel inner container surrounds the wrapped remains. The bottom of this liner must be covered with at least 5 cm of absorbent material — peat, sawdust, or charcoal mixed with an antiseptic substance — to contain any fluid release during transit.

Layer 3: Solid wood outer coffin. The sealed metal liner is placed inside a hardwood coffin or transit crate strong enough to withstand cargo handling.

Layer 4: Canvas exterior. The entire assembly is wrapped in heavy canvas to conceal the coffin shape and protect the wood surface during loading and unloading.

Dry ice or cold storage alone is not permitted as a preservation method for international air cargo. The remains must be professionally embalmed before the casket assembly is constructed.

The Embalming Certificate

Chemical preservation must be performed by an accredited mortuary in Thailand before the remains are sealed. The embalmer issues an official Embalming Certificate detailing the chemical preservation process. This certificate is required in the transport documentation package; confirm any Japanese arrival requirements with the funeral director.

Airline-Specific Policies

Each airline imposes dimensional, weight, and routing constraints:

Airlines generally require space to be reserved 48 to 72 hours in advance and may limit flights to one HUM shipment per aircraft. Transit through a third country may require additional consular clearances from that country's embassy.

JAL (Japan Airlines), ANA (All Nippon Airways), and Thai Airways each have route, dimensional, and documentation requirements for HUM cargo. Confirm the current route and booking requirements with the relevant cargo department.

The funeral director should confirm the current documentation package and submission deadline before booking.

Airlines reserve the right to reject a shipment if the casket seal is compromised, documentation is incomplete, or the dimensions exceed cargo hold specifications. A rejection can delay the repatriation while the issue is resolved and a new flight is booked.

The Hidden Cost: Second Casket in Japan

Air cargo caskets are built to international transport specifications — they are larger and heavier than standard Japanese cremation caskets. Many Japanese crematorium retorts cannot accommodate the oversized air cargo assembly. This means the family typically purchases a second, standard-sized Japanese casket upon arrival, and the remains are transferred from the transport casket to the cremation casket at a funeral home near the airport.

This cost is rarely mentioned by repatriation companies during the initial consultation. It adds a separate cost to the total repatriation bill and requires coordination between the receiving funeral home, the airport cargo terminal, and the crematorium schedule.

The Japanese Dies in Thailand — Family Emergency Guide includes casket specification checklists, airline contact protocols, and a cost worksheet that captures every line item — including the second casket — so the family has a realistic budget before committing to full body repatriation.