かいそう回送kaisou
1.

The process of redirecting incorrectly delivered mail to its intended recipient.

2.

The act of sending a vehicle, such as a train or car, without passengers or cargo, to either allow for pick-up of goods or to return it to a storage location.

3.

The transfer of items that have been received but need to be sent to a different destination for proper delivery.

4.

A logistical operation involving the movement of transportation, often unoccupied, to facilitate loading or returning to a garage or depot.

かいそうしゃ回送車kaisousha
1.

A train that is being transferred to a different location without passengers or cargo, often used for maintenance or repositioning.

2.

A vehicle that is no longer in regular service, typically moving to a depot or repair facility.

3.

The movement of transportation vehicles that are not currently engaged in revenue service, usually to return to a starting point.

4.

A conveyance traveling empty, often for operational purposes rather than for public transportation.