Suica can be used on local JR and metro lines in core Tokyo, Kyoto, and Osaka (where first time tourists often visit). Many digital shinkansen tickets can also be tied to an IC card like Suica for easier entry but payment of the fare is typically by credit card, not withdrawn from the IC card.

More info https://www.japan-guide.com/e/e2359_003.html

If you're going to less populated areas further away from a "main shinkansen station" then you might want to check IC acceptance, but most people in such a scenario would be somewhat aware of the possibility of unstaffed offices and cash fares https://www.flyertalk.com/forum/36743106-post123.html