trip in Japan april-may2018

dear,
We will go to Japan from 20th April till 5th of May.I just bought 3 JR Pass.
Here is my itinerary and I would like to know if all is feasible with JR pass? I also would like to understand the reservation system and if there is any specificity for Mount Fuji and Miyajima? thanks a lot.

day 1 Narita airport Tokyo -Hatchobori
Day2 Tokyo Hatchobori Mont fuji - station Kawaguchiko
Day 3 Mt Fuji Kyoto
day 6 Kyoto Nara
Day 7 Nara Himeji
Day 8 Himeji (Hiroshima)-Miyajima
Day 9 Miyajima Hiroshima

Day 10 Hiroshima Iwakuni return Hiroshima same day
day 11 Hiroshima Okayama
Day 12 Okayama Tokyo
Day 16 Tokyo Narita