With the first weeks of June 2011 bringing extreme and oppressive summer heat to Japan, more than 680 people have been rushed to the hospital with heatstroke thus far this year, with one death reported.

http://www3.nhk.or.jp/daily/english/22_20.html
http://blogs.wsj.com/japanrealtime/2011/06/16/as-japan-turns-down-ac-heatstroke-arrives/