Uobei is one of the sister companies of Genki Sushi, which you may be more familiar with. This conveyor belt sushi chain store offers more than 80 kinds of sushi to choose from and they are all 108 yen a plate. Every now and then, there will also be some seasonal items that are more special and a few items among those may cost a bit more. You can click here to see the standard menu and underneath, you can see the seasonal offering for 7 July - 8 August 2014.
The store that is the easiest to find for tourists is the Uobei (魚べい) Shibuya Dogenzaka store.
Address: Dogenzaka 2-29-11, sixth Central Building, Shibuya, Tokyo.
Directions: leave Shibuya station from exit 1 West Gate (on map: top left side).When you are outside, locate the Mark City sign and when you standing right in front of it, go to the left, keep walking until you see a Lotteria store in your right. Then, go left. On your right, you will very soon see a large building with a lot of restaurants, such as Royal Hut and Mos Burger. On the left of that building, there is a narrow street and once, you enter that street, you should be able to see the Uobei store.