I'm planning to go to Japan from 29 of December to 12 of January.
Just a few questions regarding the usage of JR Pass:
1. Is Nartia express included?
2. If I purchase it online can I validate it online or only after I arrive to Japan at JR/Midori Madoguchi?
3. Since JR Pass is for reserved seats (shiteiseki) do I reserve seats only after validation at Midori Madoguchi or can I reserve seats online as well?
4. JR Pass is good for any sinkansen (including Hikari) but not Nozomi and Mizuho?
I am a bit worried that when I arrive on the 29th of December and try to reserve seats there will be none available.
Thank you in advance!

