I will fly YVR-SEA-NRT next week.
YVR-SEA: AS flight
SEA-NRT: DL flight
It is one air ticket (not two separate tickets).
At SEA airport I have 2 hours layover and then continue to the DL flight to NRT.

Is it possible to check in my suitcase at YVR AS check in counter all the way to NRT?
If so, how does it work?
Do I need to pick up and then re-check in my suitcase at YVR after going through GE??? since YVR is a preclearance airport
I have never checked in my suitcase at Canadian airport before besides this time my final destination is NRT not the US airport...