In every anime, they will at least show how they celebrated new year’s eve by going to a shrine and make a wish.
And when they do that, they throw a dime or so into the shrine.
Shrine is part of Japanese culture and if you visit Japan without visiting any of their shrine then your visit is not completed.
Now you can have your own shrine papercraft in your room for good luck ^^
You can use this as a coin box too.