I'm hesitant to even put "food court" and "sushi" into the same sentence, because that summons up a mental picture that hardly does Sushi Kudasai justice. This friendly, unpretentious, mom-and-pop sushi shop is located in the heart of the downtown shopping district, one block down from Westlake Center (skip the sushi joint in that food court and come here).
Their lunch specials start at under $10 and include miso and green tea. You'll see them make your sushi fresh to order, dispelling any doubts about the admittedly lacking "food court" ambience, but service is fast and seating is plentiful. Kudasai has another downtown location, and also offers sushi cooking classes for those who want to get hands-on.