Tokyo - Hokkaido - Osaka - Koyasan - Tokyo

Hi Katryn,

Yes, the JR Pass will cover travel between all these cities. As well as local JR lines within these cities.

Note that Koya-san would need a little additional travel, as the last part is travelled on the Nankai express.

I recommend using either a 14 or 21 day JR Pass, depending on if you can return to Tokyo before it expires :)

Hope this helps,
Daniel