16 itinerary, please advise

Day 1: Reach tokyo 9.30am rest afternnon to Odaiba.
Day 2: Harajuku, Yoyogi Park, Shibuya, Shinjuku.
Day 3: Asakusa, Ueno Park, Ginza.
Day 4: Disneysea.
Day 5: Yokohama (Optional seem like ntg much to see).
Day 6: Kawaguchiko, Kochi Kochi Ropeway stay 1 night.
Day 7: Oshino Hakkai, Chureito Pagoda night take bus to Kyoto or JR train in the afternoon.
Day 8: Reach early in the morning to Arashiyama, Sagano Scenic railway stay Kyoto 2 nights.
Day 9: Gion, Philosopherfs path, Nanzenji temple, Maruyama Park, Higashiyama DIstrict (Optiona), Pontocho.
Day 10: Fushimi Inari shrine, Golden pavilion, Ninnaji transfer to Osaka for 3 nights.
Day 11: Aquarium, Namba, Dontobori, Shinsaibashi.
Day 12: Osaka castle, Umeda sky building (still thinking transport back to tokyo).
Day 13: If take flight reach tokyo in afternoon to tokyo tower, Chidorigafuchi or Megurogawa.
Day 14: Any suggestion place?
Day15: Free and easy.
Day16: Back

What to see in Yokohama http://www.japan-guide.com/e/e2156.html

What to see when in Kanagawa http://www.japan-guide.com/list/e1215.html

There is so much to see in the east that will deem your limited time in Osaka and Kyoto as a 'waste' of your time.

No, just tour in Kanto if you must. Where to go in Kanto area http://www.japan-guide.com/list/e1103.html.