Once you cross the "Sumida River Walk" from Asakusa, there are two sections leading to the Tokyo Sky Tree, West Zone and East Zone. There are many stores and restaurants such as cafes, craft beer stores, hamburger stores, and Japanese snack stores.
Tokyo Mizumachi is next to Sumida Park, and you can enjoy a walk along the river. Enjoy your meal on the terrace seats overlooking the river or enjoy takeouts in the park. https://www.tokyo-mizumachi.jp/