USA, Hong Kong, Taiwan, South Korea, Germany, China Japan is probably the most expensive country in the world to travel, but there are ways of keeping the outlays to an almost bearable level. At the other end of the spectrum, high rollers will have no problems off-loading their cash. Japan specialises in establishments catering to the ostentatious flattery of business accounts - the higher the bill, the greater the prestige of the guests.
Cash is still king in Japan, although the use of credit cards is pretty widespread in major cities.
The Japanese are used to a very low crime rate and often carry wads of cash for the almost sacred ritual of cash payment. Foreign travellers can safely copy the cash habit, but should still take the usual precautions. You can change cash or travellers' cheques at an 'Authorised Foreign Exchange Bank' or at some of the large hotels and stores. There is little tipping or bargaining in Japan. If you want to show your gratitude to someone, give them a gift rather than a tip.