Climate Change in Tokyo
I have analyzed daily maximum temperature for July and August.  The daily maximum temperature is observed at the Tokyo Meteorological Observatory, Japan Meteorological Agency.  The average and standard deviation for the period between 1951 and 1980 (1984 and 2013) are 29.9 (30.5) and 3.41 (3.49), respectively.  The frequencies of daily maximum temperature are shown in Figure.  You can confirm that the daily maximum temperature rise and widening of the variance.  These results include not only global warming but also heat island phenomenon.  Even though, our results correspond to the IPCC’s outcome.

Japan Meteorological Agency’s web site
http://www.jma.go.jp/jma/indexe.html