JB1234

Hi there, apologies for the late reply!

A one week pass + individual tickets may overall be cheaper, but purchasing a two-week pass would make things a lot more straightforward, and so it's up to what you choose to prioritise.

You can get to Koyasan via bus from Koyaguchi Station, and to Hakone by bus from Odawara station. The JR Pass includes travel to Koyaguchi and Odawara, but you'll have to purchase the bus tickets, which are very cheap so this shouldn't be a problem.

Hope this helps!

Alexis