Tokyo itinerary help

Hi, first time in Japan - arriving HND 23rd November (afternoon ) and departing 10th December ( morning).
I have 2 1/2 days in Tokyo on arrival and 2 1/2 prior to departure, staying in Marounuchi.
Because of a badly broken ankle (use a crutch) I'll be getting around by public transport and taxis.
This itinerary is based on my interests/travel planning resources but I'm not sure how feasible it is for a slow / very slow paced traveller.
Could you please check it out and advise?
In particular:
1. Not planning too much for each day?
2. Have I put the sites in the right order to minimise travel between them?

DAY 1
Subway to Shibuya – see Shibuya Crossing
• Subway to Meiji-Jingumae/Harajuku Station.
• Meiji-jingu Shrine (can taxis go through the park to the shrine
gates?)
• Ukiyo-e Ota Art Museum
• Walk/Bus on Omotesando, (architecture).
• Nezu Museum and garden.
• ?Subway ? Bus to Shinjuku Gyoen Garden
• Subway to Tokyo Metropolitan Government (sunset)

DAY 2
1. Tsukiji Fish Market (after 7am-not auction)
2. Taxi to Hama Rikyu Garden
3. Water bus to Asakusa
4. Taxi? Walk? to
Kaminarimon Gate/Nakamise Dori/Sensoji Temple/Nitemmon Gate/Asakusa Jinja/?? Kappabashi-dougugai Dori
4. Taxi to Ryogoku - Sumo museum
5. Toei Bus to"Kiyosumiteien-mae" for Kiyosumi Garden

DAY 3 (Half day)
Imperial Palace Gardens
East Gardens / Ninomaru / Sannomaru Shozokan/ Honmaru /
Through Kitanomaru-koen Park to Nippon Budokan/Yasukuni-jinja

DAY 4 (Half day)
Subway to Hibiya-koen Park
Ginza
Suidobashi / KorakuenCrossroads Chuo-dori with Harumi-dori eg Matsuya
• Mitsubishi Ichigokan Museum
• Tokyo International Forum Building (walk through)

DAY 5
1.Subway to Komagome Station - Rikugien Garden
2. Ueno Park ? Nearest subway exit for Tokyo National Museum.
• Tokyo National Museum
• Western Art Museum
3. Subway?Train? to Asakusa Pier (around sunset)
4. Water bus from Asakusa to see Odaiba Bay/Rainbow Bridge

Your advice would be really appreciated - thank you.

Subway? Too long paths and stairs. For your legs, buses would be the best. JR could be the second. Check this site for bus availabilities.
http://tobus.jp/blsys/navi?VCD=ctop&ECD=srspm&LCD=e

I could not judge your pace. Try to put your interested sites in the earlier part of the day. Rough comments on your plan.

DAY 1
JR Yamanote line to Shibuya – see Shibuya Crossing
JR Yamanote line to Harajuku Station
Meiji-jingu Shrine (Taxis could go up to the second parking lot near the Otorii)
http://www.meijijingu.or.jp/img/access/naien.pdf
Walk or taxi along Omotesando, dropping at Ukiyo-e Ota Art Museum, until Nezu Museum and garden
Bus(Kuro77)? to Shinjuku Gyoen Garden,
entering from Sendagaya Gate(south) and leaving from Shinjuku Gate(north)
http://fng.or.jp/shinjuku/issue/midokoromap/migoro1609akia.pdf
Shibjuku WE bus(green) to Tokyo Metropolitan Government (sunset)
http://www.city.shinjuku.lg.jp/content/000197749.pdf

DAY 2
Tsukiji Fish Market (after 7am-not auction)
Taxi/Walk to Hama Rikyu Garden
Water bus to Asakusa
Walk(300m) to Kaminarimon Gate
Nakamise Dori
Sensoji Temple
Asakusa Jinja
Nitemmon Gate
Taxi? to Kappabashi-dougugai Dori
Megurin bus
http://www.city.shinjuku.lg.jp/content/000197749.pdf
http://www.asakusa-e.com/megurin/megurin.htm
Rickshow
http://www.jidaiya.biz/kanko-j-eng.html
Taxi to Ryogoku - Sumo museum
Toei Bus to"Kiyosumiteien-mae" for Kiyosumi Garden

DAY 3 (Half day)
Imperial Palace Gardens
East Gardens / Ninomaru / Sannomaru Shozokan/ Honmaru /
Through Kitanomaru-koen Park to Nippon Budokan/Yasukuni-jinja

DAY 4 (Half day)
Hibiya-koen Park
Ginza
Sukiyabashi / Ginza yon-chome ? eg Matsuya
(Suidobashi / Korakuen are the north of Yasukuni and the south of Rikuguien)
Mitsubishi Ichigokan Museum
Tokyo International Forum Building (walk through)

DAY 5
Komagome Station - Rikugien Garden
JR Ueno ?
Ueno Park
Western Art Museum
Tokyo National Museum
Megurin bus or Subway Ginza line for Ueno-Asakusa to Asakusa Pier (around sunset)
Water bus from Asakusa to see Odaiba Bay/Rainbow Bridge
Water buses are not so frequent. Times for Hotaluan & Himiko are not yet determined.
http://www.suijobus.co.jp/en/price/

There are slopes around Shibuya, Imeperial Palace, and Ueno Park.

Thank you for taking the time and for giving me such great suggestions! It's going to make a big difference to my trip.
I've printed out the various maps etc and marked the bus website - which is going to be a lifesaver. Also the buses you mentioned look quite accessible to foreign tourists - a big relief.
You are perfectly right - buses are a lot easier to travel on than subways.