Both zosui and ojiya can refer to the same dish. However, while they are very similar, some say there are two main distinctions between zosui and ojiya - the preparation of the rice and the seasoning. Zosui uses rice that has been rinsed to reduce the starch, keeping the shape of the rice and only uses soy sauce to season. Ojiya on the other hand, usually uses cooked rice without rinsing, which can be mushier in texture, and can include other seasonings such as miso paste.