If you ask me for a sushi place in Berlin were you can eat really fresh sushi for a reasonable price I will most likely recommend Ishin. Ishin is a great Japanese Eatery in Berlin where ghe fish is so fresh that after tasting you forget for a sec. that you are in the middle of europe. Yesterday I was there and it was amazing as always.
The Otoro in Ishin is almost as good as in Japan!