The global warming is one of the biggest issues that mankind is facing. Japan is no exception to the global warming. In this report, using AMeDAS data for recent 28 years published on the internet by Japan Meteorological Agency, we estimate the rising rates of average temperatures in Japan area. The average rising rate of temperature per 100 years in all areas of Japan is 4.5 C. Although the distinction between the global warming and urban heat island effect is difficult, the centennial rising rate of temperature in Japan area is currently estimated to be greater than 4.0C due to global warming.
