JR Pass

Hi there,

Yes, this is correct! We do need to deliver the pass to you.

Seats can be reserved once you are in Japan and have activated the pass, see:
https://www.jrpass.com/blog/reserving-seats-boarding-the-bullet-train

Hope this helps!
Daniel

If I order from https://japanrailpass.net/en/purchase.html , I can revere seats before arrive Japan, am I correct?

Yes, that's correct.

Thanks