I love this sushi place--I've tried basically every sushi place in Pittsburgh in Oakland and Squirrel Hill, and this place is definitely the best in the 'burb aside from Chaya in Squirrel Hill. (I have yet to try Penn Fish Market, but I've heard that's amazing as well!)
It is not nearly as expensive as Chaya, but the sashimi is just as delicious and fresh. I personally LOVE the white tuna and yellowtail. :) The nigiri pieces are always served with a little lemon wedge that they cut into a snail shape, which is beyond adorable. The whole ambiance is authentic, from the outside of the restaurant to the inside.
The owner of Little Tokyo Bistro is so sweet. My friend and I love this place so much we went twice in one day, and she actually remembers us now and greet us very warmly everytime we go now :) The chef's sushi bar is right in front, and they are all very friendly. The food takes a while to come, but that is because they prepare everything after you order it, so it's fresh. The waitresses are very sweet as well.
I highly recommend this restaurant. My friend and I always go all the way from CMU to southside just to eat here xD Plus--it's open late!