Which JR Pass should I get

Hi there,

It depends on how many days you'll be traveling, but I think you could look at either a 14 or 21 day Japan Rail Pass. Travel to Hiroshima and Hokkaido is especially costly without a pass. You're going all across the country, so the JR Pass is the only option in terms of passes.

The only alternative would be looking at flights.

Kind regards,
Daniel