Time Out says
Located just behind Sensoji in Asakusa, Yadoroku is the oldest onigiri specialist in Tokyo. Choose from a range of different toppings including salmon, ume, tarako, shirasu and okaka, all for an affordable ¥280-330. Lunch sets are available from ¥690 and include two rice balls, miso soup with tofu, and takuan (pickled radish). The place stays open until 2am – perfect if you're craving a late-night snack.
3-9-10 Asakusa, Taito-ku
|Transport:||Asakusa Station (Ginza, Asakusa, Tobu Skytree lines)|
|Opening hours:||Lunch 11.30am-5pm (closed Sun). Dinner 6pm-2am (closed Tue & Wed)|