Japan Inflation Rate

In mainstream economics, the word “inflation” refers to a general rise in prices measured against a standard level of purchasing power. Previously the term was used to refer to an increase in the money supply, which is now referred to as expansionary monetary policy or monetary inflation. Inflation is measured by comparing two sets of goods at two points in time, and computing the increase in cost not reflected by an increase in quality. There are, therefore, many measures of inflation depending on the specific circumstances.

The most well known are the CPI which measures consumer prices, and the GDP deflator, which measures inflation in the whole of the domestic economy.The prevailing view in mainstream economics is that inflation is caused by the interaction of the supply of money with output and interest rates. Mainstream economist views can be broadly divided into two camps: the "monetarists" who believe that monetary effects dominate all others in setting the rate of inflation, and the "Keynesians" who believe that the interaction of money, interest and output dominate over other effects. Other theories, such as those of the Austrian school of economics, believe that an inflation of overall prices is a result from an increase in the supply of money by central banking authorities.

Related concepts include: deflation, a general falling level of prices; disinflation, the reduction of the rate of inflation; hyper-inflation, an out-of-control inflationary spiral; stagflation, a combination of inflation and poor economic growth; and reflation, which is an attempt to raise prices to counteract deflationary pressures(source: wikipedia).