If you live in Japan, you will see all the commercials in the コンビニ are about this.
It’s a large, long roll of sushi usually with 7 ingredients (七福神). You hold it. Then
Face a lucky direction (恵方, 2020 is 西南西 (WSW), 255 degrees).
Make a wish for this year with your eyes focus on that lucky direction.
Munch it in one go silently.
Can’t stop. Finish in one go.
Thinking what you want while eating.
But all shops are selling it also an issue of food waste: