Sushi Hama used to be good, excellent in fact. Since they expanded their sushi is tired and dull.. They seem to be catering to the all you can eat crowd where the emphasis is on quantity and to hell with quality.
If all you want is to fill your gullet with cheap, boring fish, this is a good place. If you're looking for fresh fish, cut by a pro and delicately flavored, this is not the place.
When I look around I see people dunking their pieces in massive quantities of soy sauce and wasabi, a sure sign that either they know nothing about sushi or that they'll do anything to add some flavor.
By the way, this is one of those "all you can eat" places where, if you don't finish the plate, they charge you for the extra. Given the ratio of rice to fish, it would be easy to get stuffed here and not finish.
It's sad to see a once decent local place go to hell. There are many other better choices in Tucson.
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