Tokyo Wako is in the Paseo Colorado mall area. It's a huge restaurant that gets pretty busy at night. I think this is an advantage for a sushi place because the fish is fresh and always being served up. It seems that there sushi is also really large. I know that large doesn't equal good when it comes to sushi, but quantity makes me happy.
Besides sushi they have the Beni-hana style cook at your table thing going on. That is tasty too, if you are into that kind of thing.