|Delivery speed||Air Mail (Small-Packet) and e-packet are the same delivery speeds.
It is the same as the speed which delivers a picture postcard etc.
|Tracking number||Air Mail (Small-Packet) and Airmail plus do not have tracking number.
They cannot be tracked after shipment.
e-packet has tracking number.
Probably, it will be difficult to track it except for some countries.
|Insurance||Air Mail (Small-Packet) does not have Insurance.
e-packet has the insurance of max 6000YEN.