Red sushi rice (left), White sushi rice (right)

There are two types of shari, the name for sushi rice, in Edomae sushi.
Shiro shari (“white vinegared rice”) is made from clear rice vinegar, while aka shari, (“red vinegared rice”) is made from red vinegar, a sweeter vinegar made from sake lees.
These two varieties of shari form the fundamental flavor of sushi.