It's a double-edged sword though. A weaker yen can increase export sales, however import value will be much higher. Currently, most products in Japan are made from Japanese companies, which is why the Japanese people don't feel the impact yet.
Much food and natural resources are imported, not to mention anything dollar pegged like smartphones are simply getting more expensive. Seriously, stuffs like iPhone and GPU feel stupidly expensive but when you check the price in dollars, they look acceptable.