In the sense that it's a major station with a lot of people flowing through, multiple levels, etc. - sure.

With that said, every major station I've been through in Japan, the signage for where to go for the shinkansen area is pretty big and obvious. 🙂 There will also be station attendants around that you can ask if need be.

Give yourself a little extra time so you can shop around and find a good bento to take with you on the train... ekiben is part of the shinkansen experience!

You'll do great.