Translation guide
A unique identifier assigned to a package or shipment that allows you to monitor its delivery status.
What's the tracking number?
Do you have a tracking number?
The code used to track a parcel or delivery online or via an app.
Standard term used by Japan Post and most courier services. Literally 'tracking number'.
Please enter the tracking number.
You can check the status of your package with the tracking number.
Used by Japan Post for registered mail and some services. More customer-service oriented, meaning 'inquiry number'.
The tracking number is printed on the slip.
Used by some courier companies like Yamato Transport. Refers to the number on the waybill.
If you don't know the tracking number, please contact the sender.
追跡番号 is the most universal and understood by all carriers. Use お問い合わせ番号 specifically for Japan Post services that use that terminology. In casual conversation, simply saying 番号 (number) is often enough if context is clear.