16 days in Japan – Itinerary check

Hello folks, I will be leaving for Japan in a few days. I would like your input on my itinerary. If it looks too crazy, let me know. If there's more I can add, let me know. It will be our first time travelling to Japan (two people). Thank you!

TOKYO (5 Days)
Day 1: Arrival
* Arrive in NRT airport early afternoon
* Take train to accommodation in Ueno
* Ameya Yokocho market/Ueno Marui for dinner

Day 2:
* DisneySea Adventure

Day 3:
* Shibuya
* Shinjuku
* Ginza

Day 4: 
* Tsukiji Outer Market
* Akihabara

Day 5: Day Trip to Mount Fuji depending on weather
* Train to Mount Fuji area. Visit Lake Kawaguchi or Chureito Pagoda?

KYOYO (4 DAYS)
Day 6: Arrival in Kyoto
* Nishiki Market
* Imperial palace
* Pontocho Alley

Day 7:
* Fushimi Inari Shrine
* Kiyomizu-dera

Day 8:
* Arashiyama Bamboo Grove
* Iwantayama Monkey Park nearby
* Kinkaku-ji Temple (Golden Pavilion).

Day 9:
* Gion
* Starbucks in Ninenzaka
* Kodai-ji Temple

OSAKA (5 Days including Hiroshima)
Day 10: Arrival in Osaka
* Namba
* Shinsaibashi
* Amerikamura
* Dotonbori

Day 11:
* Osaka Castle
* Umeda Sky Building

Day 12: Day Trip to Hiroshima
* Visit Hiroshima Peace Memorial Park
* Atomic Bomb Dome
* Hiroshima Castle.

Day 13:
* Sumiyoshi Taisha
* Tennoji
* Shinsekai

Day 14:
*  Universal Studios Japan

Back in Tokyo (last 2 DAYS)
Day 15:
* Visit Yokohama Sea Paradise for 10am
* Yokohama Chinatown
* Head to reservation at Shibuya Sky in the late evening

Day 16: Departure Day in the late evening
*  Last-minute shopping in the Ueno area or nearby shopping streets.