About two months ago, I asked for the best sushi place, and somebody recommended Syun in Hillsboro. I tried that restaurant the other day, and it turned out to be the best sushi in PDX.
As a Japanese, I often get disappointed by Americanized sushi restaurants, but this one is very authentic. The fish is very fresh and the rice is not too big. (Since I moved to PDX in January, I've noticed sushi in PDX tend to be huge.)
I ordered special sushi (the most expensive sushi set) and was asked, "You have two choices: would you like quality or quantity?" Of course I chose "quality" and I got good stuff--sea urchin, abalone, white salmon, crab leg, to name a few. I wonder if Americans also get this question, but I suggest that you insist on quality. I heard if you answer "quantity," you'll get lots of rolls.
I'd been in quest of good sushi, but it's over now that I know Syun. If you look for chunky, filling sushi, you'd be sad at this place. But if you are a fan of authentic Japanese sushi, I highly recommend it.