Rode the Shinkansen twice in the last week (Tokyo<->Osaka). Not the most scenic, but you do have a spot where you pass Mt Fuji.

Not sure if this route goes the full 320 km/h but it was plenty fast!

Loved the convenience and ease though. Having to schlep to the airport and deal with all the hassle of flying sucks by comparison.

Rock up to the station, buy a ticket, wait 30 minutes and go.