We stopped over in Shinagawa Station a few times, mostly being on the Yamanote Line and I think once for a Shinkansen trip.
This station was where most of the Shinkansens departed out of to the rest of Japan. It was also a big hub for a lot of other lines, so inside the station was pretty modern and packed full of shops. Stations like these almost felt like you were in a major airport back in the US.I need to find my notes for this. Check back soon!