Ohayou minasan!

I am planning for a 14 days trip to japan and will mainly cover kantou and kansai region... Need some recommendations on side trips... Below are my itinerary:

Day 1: Chubu (overnight flight - arrive morning) - Kyoto
Day 2: Kyoto
Day 3: Kyoto
Day 4: Nara
Day 5: Kyoto - Hiroshima
Day 6: Miyajima - Tokyo
Day 7: Tokyo
Day 8: Tokyo
Day 9: Tokyo
Day 10: Tokyo
Day 11: Tokyo
Day 12: Nikko or Takayama
Day 13: Nikko or Takayama - Nagoya
Day 14: Nagoya - Chubu

Need some opinions on:
1. Should I add a day for Kobe or Mount Koya by slashing one day off Tokyo? Which will offer a more authentic Japan experience?
2. Which will be more satisfying in between Nikko and Takayama in your opinion? Should I skip exploring Nagoya and spend more days in one of these two places? I am more keen for cultural exposure and scenic views btw.