There are many Sushi restaurant in Shanghai. The one I prefer most is the hlshushi, a restaurant chain with different shops in town. It has reasonable quality for reasonable price. Moreover here I can see the staff (manly Chinese) rolling the maki under my eyes. The restaurant I usually go is in Huichuan Lu, in front of Clouds Nine (龙之梦 lóng zhī mèng). On Monday and Tuesday they have special offers.