Go on a shopping spree at Aeon Mall Kusatsu. With lots of places to give your credit card a workout, you can easily while away an entire day scooping up bargains.
This shopper's paradise is in Kusatsu, but Aeon Mall Kusatsu isn't the only thing to see in this corner of the world. If you've got time for more sights, Biwako Hall is worth a look as well.