These Stoneham, Arlington, and Methuen, respectively, restaurants are apparently under the same ownership. I was at Sato II yesterday to use a coupon and noticed all three names on the chopstick wrapper. I am pointing this out just so folks can use their experiences at one of them in deciding whether or not to try another. Not that the quality of the food is guaranteed identical, but as a guideline.
I enjoyed the sushi but it's only my 5th or 6th time eating it so my opinion counts for nothing. Because I read on Yelp that they make their own crab rangoon, I tried it and will say that it was the best rendition of that app that I have had. Generously-filled, in very thin and very crisply-fried wrappers.