After the war, Japan had a rough time rebuilding itself. People tried to tighten their wallets and save up every bit they could.The deficit of products forced new inventions to come forth. Smokers had a problem of not being able to smoke a cigarette fully. Tadao Kashio invented a ring-holder with which a cigarette could be smoked to its very end without the risk of burning your fingers. Another advantage of it was that your hands were always free. The money that he made from these rings he and his brothers used to start a company named Casio.