Time Out says
Whimsical onigiri dealers Risaku take their rice balls seriously: they have 30-odd filling options to choose from. Have one of the morning sets, which come with an onigiri or two, plus miso soup and/or side dishes – all for ¥500.
2-31-6 Sendagi, Bunkyo-ku
|Transport:||Sendagi Station (Chiyoda line), exit 1|
|Opening hours:||8am-8pm / Closed Wed|