Hakone to Takayama

Hi there,

The fastest way is to take a Shinkansen train from Odawara (in Hakone) to Nagoya and use a ltd express train from there to Nagoya.

For Takayama to Koya-san, travel the same way back to Nagoya, use a Shinkansen from there to Osaka, then take a local train to Shin-Imamiya and the Nankai express from there to Koya (GokurakuBashi).

Hope this helps,
Daniel