Common loanword for goods transported by ship, plane, or truck. Often used in compounds like カーゴパンツ (cargo pants) or カーゴ船 (cargo ship).
This ship is fully loaded with cargo.
空港でカーゴの積み下ろしを見学した。
I observed the loading and unloading of cargo at the airport.
roll box pallet; cargo container
bulk cargo
cargo sling
Borrowed from English 'cargo', likely via maritime or aviation terminology.