In this small kiosk you will never find a free space - whenever you come is always full of people. But when you try their sushi you will understand the reason why. Kojiro made me addicted to sushi, whilst before I considered myself as a "meat-man". So if you decide to follow the advice and go there then you must take their "Kojiro-spezial" - is an assortment of different type of sushi.
Believe me - it will become a place where you occasionally find yourself everytime when you want to enjoy seafood.