Onigiri
Onigiri (お握り) is a Japanese rice ball snack most commonly sold in triangular form and wrapped in seaweed (nori).
History
Writings dating back as far as 1600s tell us that many Shoguns stored the rice balls in their pockets as a lunchtime meal when at war.Availability
In Japan every convenience store is stocking Onigiri in many popular flavors. Specialized shops, called Onigiri-ya, offer handmade rice balls for take out.