It's derived from the word "su-shi" (鮨), which originally meant "sour-vinegared rice." This is because the rice used in sushi was traditionally fermented with vinegar, salt, and sometimes sugar to preserve it.
It's derived from the word "su-shi" (鮨), which originally meant "sour-vinegared rice." This is because the rice used in sushi was traditionally fermented with vinegar, salt, and sometimes sugar to preserve it.