First off: best sushi downtown.
This is a no frills family-ran establishment in a little street side store front on east 6th street- it's a little hard to find. I am not a true sushi connoisseur (I mean... I'm from Cleveland), so favorite is the Sunday Morning roll, which is a deep-fried salmon and cream cheese concoction that is actually pretty filling. Again, I can not stress enough that this is nothing fancy from the outside or within, so if that worries you then don't go.
If you don't care and just want to eat some sushi, then 100% go and try this place. Like I said, best sushi you can get downtown. Granted, it's Cleveland, so there's not a lot of options to begin with, but if sushi is what you crave - Sapporo will satisfy.