1. United Nations, Climate action: UN chief encouraged by Japan’s 2050 net zero pledge, United Nation News. (26 October 2020). https://news.un.org/en/story/2020/10/1076132..
2. National Institute of Population and Social Security Research, Population projections for Japan: 2016 to 2065 (in Japanese), http://www.ipss.go.jp/index-e.asp, 2017 (accessed 10 June 2020).
3. United Nations, World population ageing, https://www.un.org/en/development/desa/population/publications/pdf/ageing/WorldPopulationAgeing2019-Report.pdf, 2019 (accessed 10 June 2020).
4. S. Conti, P. Meli, G. Minelli, R. Solimini, V. Toccaceli, M. Vichi, C. Beltrano, L. Perini, Epidemiologic study of mortality during the summer 2003 heat wave in Italy, Environ. Res. 98 (2005) 390–399. 10.1016/j.envres.2004.10.009.
5. Perceptions of heatwave risks to health: Interview-based study of older people in London and Norwich, UK;Abrahamson;J. Public Health (Bangkok),2009