The interest rate is an important tool of monetary policy. Japan has changed the concept of using the interest rate as a tool to achieve low rates of unemployment through the use of the low interest rate, and it has even reached what is known as the "zero interest rate". Consequently, the research problem revolves around identifying the reality of the interest rate in Japan, and identifying its contribution to reducing the unemployment rate in Japan by analyzing the data for the study period (1981-2017). The most important results indicated that Japan achieved the lowest average in the real interest rate in the period from (2007-2017), as in the recent period it is among the four countries that adopted the negative interest rate in its monetary policy, as economic statistics indicate that Japan, Sweden, Denmark and Switzerland Negative interest rates are based on -0.1%, -0.3%, -0.7% and -0.8%, respectively. The research recommends, the necessity of using a monetary policy that seeks to reduce the interest rate to push the investment wheel and from it to reduce the unemployment rate.