Onigiri is a rice ball which is both a comfort food and a to-go meal in Japan. It is a simple, light and savory food made from steamed rice with a filling inside and usually wrapped with nori (dried seaweed). You can fill an onigiri with anything, but the most common fillings in Japan are umeboshi (salted plum), kombu (seasoned kelp), and sake (grilled salmon). The rice used in onigiri is typically Japonica short rice, a short white grained rice. Contents: What is Onigiri (Rice Balls)? ...