ldo moment, but I haven't come close to the sushi I've eaten in Japan.
that's the header from the website, but it's a pic of the tuna special. probably runs about 20-25 bucks, with the exchange rate and came with all sorts of tuna goodness from maki rolls to aburi toro (sprinkled with salt and seared lightly). 24 hours, 6 floors (with an individual sushi bar on each floor) and pretty cheap (105 for 5 people eating dinner). right in the heart of Tsukiji. the wife and I enjoyed it so much we went back for breakfast the next two mornings. we got there right after the auction and I found myself eating kanpachi that was still alive when we walked in.
also of note is the aburi gyu nigiri: thin slices of wagyu beef sprinkled with salt and lightly seared with a torch.
the place is so good that the wife and I did a one day trip to tokyo (left sfo friday, arrived sfo sunday) just to eat there when I found out I was getting laid off from the airline.
one note about the fish in Japan: I'm not sure if the it's because they have a better selection or because the waters around Japan are colder than they are around here, but the fish is sooo much better quality. the color of the otoro that I've seen in the US is approximately the color of the maguro they serve there. so much fattier and delish. the hamachi there tastes like a completely different fish than the one we get in california.
the best I've had in the US was a place called "Mitch's" in honolulu. nothing fancy (byob, even) but the best fish. Mitch's son was a fish supplier who sold fish to the restaurants in honolulu. he still does that, but he saves the best stuff for his dad's place. it's in a very industrial area and the restuarant fronts the fish supply warehouse. very low key but great fish.