tokyo-sapporo-takikawa-sapporo

Hi there,

1.) Yes, you can use the Hokkaido Shinkansen all the way from Tokyo - Shin-Hakodate-Hokuto. When searched for the route in www.hyperdia.com, keep the option for Nozomi/Mizuho/Hayabusa on, because the Hayabusa Shinkansen is covered by the JR Pass.

2.) Yes, all of these trips are covered :D

Hope this helps,
Daniel