To summarize – Nothing surpasses freshly prepared sushi rice. Occasionally, you may produce too much food and not want it to go to waste, or you may want to prepare it in advance. There is just one acceptable way to store sushi rice overnight, and that is in a container in the refrigerator.
Can sushi rice be prepared the night before?
You can prepare sushi rice up to several hours beforehand. Cover it with a clean, damp towel and leave it at room temperature on the counter. Refrigeration may cause the rice to dry out, so we recommend preparing the exact amount you will consume and consuming it on the same day.
How can sushi rice be kept soft for the next day?
Step 2: Soak two kitchen towels in water, wring off the excess, and lay one towel flat on a platter. Place the sushi on the towel, then cover it with the second moist towel. Refrigerate it after wrapping it in plastic wrap. This will prevent the rice from drying out and becoming stiff, albeit at the expense of the nori’s texture. 
Step 7: Preparing the Ingredients – The sushi rice can be prepared four hours before the guests’ arrival. Cover it with a damp dishtowel. Cut the items into tiny or thin slices in advance and arrange them on serving dishes. As part of the activity, you may also include the team in the preparations.