The word "sushi" comes from which of these languages?

Sushi is a popular Japanese dish made from seasoned rice with fish, egg, or vegetables. A sushi roll is shaped inside a thin sheet of seaweed. Sushi comes from a Japanese word meaning "sour rice," and it's the rice that's at the heart of sushi, even though most Americans think of it as raw fish. In fact, it's the word sashimi that refers to a piece of raw fish. When you eat sushi, you might eat cooked egg and rice, avocado and rice, or cooked fish and rice, as well as sushi made with raw fish and rice.

Source: Vocabulary