The purpose of the present study is to evaluate the annual rising rate of the annual temperature and the monthly average temperature, at urban area of Japan in recent years. Further, this report attempts to understand the climate change in Japan and to estimate the current state of global warming. The daily mean temperature, the daily minimum temperature for 59 years were analyzed from 1950 to 2008 using the meteorological observation data that the Japan Meteorological Agency being published on the internet. Moreover, the influence of the economic activity in Japan was examined by analysis on the relationship between the rising rates of the temperatures and the local temperature. Annual average temperature of 47 observations picked up in Japan is rising at the rate of 2.5℃ / 100years. This includes global warming at 1.7℃ / 100years and urbanized effect at 0.8℃ / 100years. Some monthly mean temperatures have a bigger annual rising rate.
