These are usually the translucent ones available at most stores. This is usually done twice a month. Aluminum and steel cans, plastic bottles, styrofoam, etc. There are collection boxes in some of the larger supermarkets as well. Earthquakes Japan is an earthquake prone country.
Minor tremors occur frequently and there is a possibility of a major one in the near future.
You're safer inside. Buildings are constructed to be earthquake resistant. Make sure you know the one in your area. Turn off the engine, abandon the car, leave the key in the ignition. Get away to avoid possible gas explosions.