Onigiri

Onigiri, also known as omusubi or nigirimeshi, is a Japanese rice ball made from white rice, usually shaped into a triangle or cylinder and wrapped in nori seaweed, traditionally filled with salty or sour ingredients such as salted salmon, pickled Japanese plum, smoked and fermented bonito, kombu or pollock roe, though modern versions use a much wider range of sweet and savory fillings. Because it is easily portable and eaten by hand, it has long served as a bento or travel food, originally as a way to use up leftover rice before becoming a regular meal in its own right, and it is now sold with many fillings and flavors at Japanese convenience stores, supermarkets, izakayas, sit-down restaurants and specialized onigiri-only shops. Onigiri is not a form of sushi and should not be confused with nigiri or nigirizushi: onigiri is made from plain, sometimes lightly salted rice, while sushi rice is seasoned with vinegar, sugar and salt.