Sushi Sumo 2653 Kirkwood Highway New Castle County, Delaware, 19805 Phone: 302-366-1188 Restaurant Category: Asian Profile Sumo has all the hallmarks of a great sushi spot: a nice variety of quality sushi at fair prices. Let this business know you found them on Delaware Today's Online Directories. Locations New Castle County 2653 Kirkwood Highway New Castle County, Delaware 19805 Claim/Edit Listing