Shopping during the New Year holidays

Plan to shop/tour during the new year holidays of 12/28 to 1/2. Can you please advise if my following itinerary would be good during the holidays? Also on 1/2, where should I go for the best deals (interested in fashion and anime goods, so for example would Akihabara have big sales on 1/2? )

12/28: Ueno/Akihabara
12/29: Kichichoji/Nakano
12/30: Shibuya
12/31: Shinjuku (do the department stores still open on NYE?)
1/1: Kamakura (Is it too crowded to see the big buddha on 1/1?)
1/2: Shinjuku or Shibuya (are there a lot of sales on the 1/2, and is Shinjuku or Shibuya the best place for them?)

As far as I have experienced:

- On New Year's Eve, supermarkets and some department stores close a bit early, like at 5pm or 7pm, so that the stores can change their decorations and merchandise for the opening on (the 1st or) the 2nd.

- The basement food sections would be in chaos, as locals shop last-minute for the New Year's celebration dishes.

- Some years department stores open on the 1st, some other years on the 2nd.

- At department stores/fashion retail stores, Jan. 2nd (they sometimes start on Jan. 1st) is usually when they start selling their "happy bags," like you get a bag full of clothing from a certain brand for a fixed price of 30,000 or 50,000 yen (you can't see what's in it), and local people check in advance which department stores sell how many such "bags" from which brand, and line up before the store opens so as to get one of those bags from the brand they like.

- Expect a huge crowd in Kamakura on the 1st.

I am not familiar with Akihabara during the New Year's days.

Please read:
http://www.japan-guide.com/e/e2276.html

Retail business is as usual until 30th Dec, short trading hour on 31st Dec, mostly closed on 1st and 2nd Jan, but, some shops open from 1st Jan in Akihabara and Asakusa.
I would visit Akihabara on 2nd Jan. You can expect a little discount about 100 Yen per shopping.

Kamakura of New Year is crowded than usual.
Buddha also are many people.
However, compared to the Tsurugaoka Hachiman Shrine, people are not many.
(In Tsurugaoka Hachiman Shrine it is, gather about 2.5 million people in January 1 to January 3)
Most vacant time of Tsurugaoka Hachiman Shrine is like 6:00 to 10:00.
New Year's Eve is the middle of the night also is small number are moving train.
People to see the first sunrise from Kamakura coast often.
(Pretty cold)
Buddha is the 8:00 open.

Thank you all for your responses.

Is it better then to go to Kamakura on the 28th or 29th (to stay away from the crowd) and Shinjuku/Shibuya on 12/31 and 1/1? Can you confirm that the key department/chain stores in Shinjuku/SHibuya will be opened? (Loft, Tokyo Hands, Lumine, Isetan, Muji etc.?)

The stores don't yet state on their calendar/website whether they will be open on Jan. 1st next year.

This is the list of department stores' first business day at the beginning of 2015. You can see that not too many say 1月1日 (Jan. 1st) - marked in red. In Shinjuku no department store was open on the 1st, only Seibu Department store was open on the 1st in Shibuya.

http://www.depatsu.net/special/sale_newyear_2015/

Shops that were open from January 1 this year
Tokyo Soramachi
Omotesando Hills
Odaiba (Venus Fort・ Divercity・ Aqua City ・Decks Tokyo Beach)
Roppongi Hills
Laforet Harajuku
Tokyu Plaza Omotesando
Shibuya Parco
Shibuya Seibu
Shinjuku Milord
Lumine Est Shinjuku
Seibu Ikebukuro
Sunshine City
However, Meiji Shrine since shrine that gather the most people in Japan, Harajuku might Crowded.
There are many shops that sell the first sale or lucky bags.
However, it may be be difficult to buy some of the popular.
In particular, since such as Laforet or can matrix from the early morning.
New Year's Eve there are many department store that closed in 1-2 hours earlier than usual.
Kamakura is not crowded prefer the end of the year than the New Year.