Is Hiroshima/Miyajima too much for this itinerary?

Hi everyone - I’m planning a 2 week trip to Japan for mid-November for my honeymoon. I’m flying into Osaka and flying out of Tokyo (and would like to spend the last 5 days in Tokyo). We are wanting to do a lot of sightseeing, but in general would like a more relaxed trip. As such, I’m worried that going to Hiroshima and Miyajima might be too much for this itinerary, but would love to hear what you guys think. Thank you!

Day 1: arrive in Osaka at night

Day 2: Osaka Day 1

Day 3: Kyoto Day 1

Day 4: Kyoto Day 2

Day 5: Kyoto Day 3 & Nara

Day 6: Hiroshima

Day 7: Miyajima

Day 8: Hiroshima/Train to Tokyo

Day 9: Tokyo Day 1

Day 10: Tokyo Day 2

Day 11: Tokyo Day 3

Day 12: Tokyo Day 4

Day 13: Tokyo Day 5

Day 14: Depart Tokyo