18 days japan itinerary

Hello!

I am visiting Japan on 19th Nov to 6th Dec. I am very excited as this is my first time there!
Would love to run my itinerary by you first to make sure I get the most out of my 18 days in Japan :)

Day 1-3: arrive in Tokyo at 11am. Explore Tokyo.
Day 4: Head to Hakone or Shirakawa-go in the morning. Stay 1 night here.
Day 5: Explore around Mount Fuji Area (any suggestion please?). At 6.20pm take overnight train to Sapporo!
Day 6: Arrive in Sapporo 6.30am. Stay in Sapporo or Hakodate.
Day 7: Day trip in Hokkaido (which area in Hokkaido worth visiting in November? I am not skiing). At 9 pm take overnight train to Takayama.
Day 8: Arrive in Takayama 10am. Explore Takayama.
Day 9: Explore Kanazawa. Head to Kyoto in evening.
Day 10-12: Explore Kyoto.
Day 13: Head to Kinosaki Onsen in the morning. Stay 1 night here.
Day 14-15: Head to Miyajima in the afternoon. Explore Miyajima and Hiroshima.
Day 16-17: Explore Osaka, including day trip to Nara.
Day 18: Head to Tokyo.
Day 19: Fly home at 2pm :(

My itinerary look somewhat ambitious :) But I really like a fast paced travelling hopping from one town to another.
Do you think this itinerary is Do-able?
Any suggestion whether Hokkaido worth a visit in November?
Which town has the best view of Mount Fuji?

Also regarding overnight train to Sapporo, how much does it cost for a JR pass holder to sleep on a berth?

Thank you!!!