If you are in Japan, a lot of Sushi restaurants deliver fresh sushi to your home with just a phone call in advance. Most of the time, the sushi comes in a Japanese Jubako box, a special lacquered food box similar to Bento boxes. These days, if you are in central parts of Tokyo, you can order sushi via Uber Eats; however, I would recommend ordering directly from local sushi restaurants if you can find one with good ratings in your neighborhood. Those sushi restaurants normally have more fresh and quality neta (toppings).
The photos below are Demae Sushi I had the other day in Yokohama. They look pretty good, don’t they?