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[3] Fire and Disaster Management Agency, Japan, in Japanese, 2011. http://jsem.umin.ac.jp/pdf/heat_qqhansouteikyou.pdf#search=
[4] Japan Meteorological Agency, in Japanese, 2011. http://www.data.jma.go.jp/obd/stats/etrn/index.php?prec_no=36&prec_ch=%95%9F%93%87%8C%A7&block_no=47595&block_ch=%95%9F%93%87&year=&month=&day=&view=