Heat Illness Risk Information (Japan Meteorological Agency)
https://www.data.jma.go.jp/fcd/yoho/data/kouon/heat_illness.html
Multilingual Information on Disaster Mitigation (Japan Meteorological Agency)
https://www.jma.go.jp/jma/kokusai/multi.html
Basic information on Safety tips, an app that provides disaster information including heatstroke information to international visitors (Japan Tourism Agency)
https://www.jnto.go.jp/safety-tips/eng/index.html
Heat Illness Prevention Information (Ministry of the Environment)
http://www.wbgt.env.go.jp/en/