Good morning,Next July I will visit the Japanese Alps,And I would like to buy the three stars alp...

Good morning,Next July I will visit the Japanese Alps,And I would like to buy the three stars alps pass from Shinjuku to Matsumoto-Hirayu (I am going to stay at Hirayu overnight). - Takayama- Shirakawago-Kanazawa
One way route.
I would like to know if it is possible to stay overnight in Takayama and next morning take the bus to Shirakawago
My plan is :
Bus from Shinjuku to Matsumoto,visit the castle,after that take the bus to Hirayu Onsen and stay the night.
Next morning,take the bus from Hirayu to Takayama,visit the city and stay the night.
Next morning take the bus from Takayama to Shirakawago,visit Shirakawago and then bus to Kanazawa.
I also would like to know if this pass is valid on buses going from Hirayu to Shinotaka ropeway and back to Hirayu and then to Takayama.

In case this could not be possible,what you recommend to me the best and economic way to do the route.In fact, I would prefer doing Tokyo-Hirayu-Takayama-Shirakawago-Kanazawa but I do not know if there is some special pass better than the Alps 3 stars pass and I think buying all the tickets separated is going to be more expensive.

Thanks a lot for your help in advance and kind regards from Spain.