tokyo restaurants

Hi, We will be in Tokyo for 6 days this April. Please suggest must-try japanese restaurants whether fastfood or not. Our trip will be mainly about experiencing authentic japanese food: tempura, ramen, sushi, pasta, teppanyaki, sukiyaki/shabu shabu and kobe beef!

We will be staying at Courtyard Marriot Ginza but we will be going around Shinjuku, Harajuku, Shibuya, Akihabara and Disneyland.

I would appreciate if u can also give the location of the restaurant and price.

A friend of ours suggested Tokyo Museun Cafe/Restaurant. Is this a good place for dining? Where is it located and around how much are the dishes there?

Thanks in advance!

Looking around the Restaurant levels of the dept store and just cruise looking int he window displays.or round station corridors or in the food courts.
My favourites are Tonkatsu restaurants,(breaded pork fillet served with Tonkatsu sauce (divine) on a coleslaw with rice and side dish. Other favourite is tempura-don (tempura on bowls of rice, esp prawns (ebi)