By far, bar none, the best sushi restaurant in Portland. I've been to Yoko's (the fish was good but the service was atrocious, the restaurant was dirty (which freaked me out a bit) and the sushi chef's at the bar area were downright snotty and mean -- I'd never go back). I've also been to Masu (it was good, too, very clean and the sushi chef's were all very nice), but Hiroshi wins hands down when it comes to the freshest sushi, best service, cleanest restaurant, friendly wait staff, and all around best sushi chef's. The fish is always fresh, fresh, fresh with to die for salmon, yellowtail and tuna, and the spicy tuna rolls are out-of-this-world GOOD! I read one review here where a reviewer was complaining about the food (the chef's special) not being up-to-par. I can only say this, I have never had a bad meal here, ever. The portions are more than fair in size, the fish always, always fresh (and I eat here at least 2-3 times a month), and although it may be a tad bit more expensive than some other sushi restaurants around town, I'd really find it hard to complain about that myself, seeing as I really feel you do get what you pay for (especially when it regards raw fish), if you know what I mean. You can't beat the cleanliness of the restaurant itself, the fresh fish, the friendly wait staff and good service or the sushi chef's. It's a great place to dine. I highly recommend Hiroshi.
Pros: Freshest fish in Portland, good service, friendly, helpful wait staff, great sushi chef's.
Cons: I can honestly think of none.