Nakazawa is very good, strictly sushi and melon at the end, tries to be Jiro without the 20 minute rush, no tsumami, no amuse, no sashimi, no cooked foods. He experiments a little bit, like using mustard in akami, smoking fish in hay he found at petco(not sure if he was kidding). I usually hate cooked shrimp but his was very good. His shellfish is some of the best I've had in nyc. His tamago is more flan like custard and very sweet compared to other places that do a castella style or tamagoyaki style.
Ichimura's tsumami is excellent if you love livers, guts and entrails, but I think I went during a time when there a high chance of a DOH inpsection, so all the fish was ice cold in both sushi and sashimi courses. He really tried to stuff me when I went, kept asking if I want seconds, but still charged me a flat rate. I will probably give it another chance one day.
Azabu is very good, probably the most traditional of the ny places from my experience. Similar to Ichimura, not much variety in terms of seasoning, variety of fish wasnt as crazy as say 15 East, Kanoyama, Sushiden, or Yasuda, then again I am not a regular at Azabu maybe they save the rarer items for regulars, Seems like thye use the same type of house age tare on every piece but I've only been twice. I dont think there will be much drop off from Yasuda in terms of fish quality,definitely wont have the eel variety of yasuda, and its personal preference in regards to the rice for the most part. I stopped going to Yasuda years ago because he would always try to rush me out in under 20 minutes, probably because I never found him funny and didnt laugh at his jokes like his other customers would.
I've been hearing good things about Sushi Dojo. Nakazawa told me he ate there and said it was very good. Recognized a few people from 15 East, Kurumazushi and Lan at the counter when I walked by.
Avoid Kura. First time I went the rice was okay, a bit compressed, second time I went the rice was wet, sloppy and he raised the prices that I should have just tried to do a walk in at Dojo, but I was hungry as hell and they had 2 spots open at the counter.
Kind of interested in Tanoshi, Sushi Yasaka, NY Sushiko(best yelp reviews ever lol) but they're kinda out of my walking distance.