A totally unique experience that is a trip in itself! Small, poorly marked sushi shop that blends in with the surrounding shops BUT everyone knows where it is!! Just look for a long line on the side street after HMV, walking from Shibuya Station. Don't worry, this queue moves along fast as patrons only have 15 minutes to eat seven plates (14 pieces) or 20 minutes for 10 plates.
If you love sushi this is heaven for you! You can get anything you wanted ever and all for the 100 yen per plate! TORO yourself out! Also do not be shy to yell out what you want to the sushi maker in front of you. They are more than willing to give you anything fresh!
I suggest this: (by sound I know how to write it correctly, but this is easier for you non-nihongo speakers)
First say "Sen me ma sen". When he answers say, "Ney gi (like gift) toro koo dis sigh." You just ordered the super yummy Super Tuna with chives, my favorite!!