Onigiri, rice moulded into triangle and wrapped in sheets of nori (seaweed) is Japan's ultimate snack. You know, the ones at the convenience store; try them at Tokyo's oldest onigiri shop (opened in 1954), made-to-order with the high-grade rice still warm and the nori still deliciously crisp. Lunch sets include miso soup. Onigiri Yadoroku will close early when it runs out of rice.
Onigiri Yadoroku
Top choice in Asakusa & Sumida River