Japan Rail pass

Me and my friends are heading to Japan in October and are staying in Tokyo for around 10+ days

We do however want to got to Hiroshima, Mt Fuji and Kyoto just to name a few quick examples

What would be the best thing to do for the train as I have seen these Rail Passes but would something specific be the best thing to go for?

Any help would be great

by JOSHCBLUE