1. The GHG Emissions Data of Japan (1990–2015). The Greenhouse Gas Inventory Office of Japan. 2016. http://www-gio.nies.go.jp/aboutghg/data/2017/L5-7gas_2017-gioweb_E1.3.xlsx . Accessed 29 Sept 2017.
2. Small and light truck market trend survey. Japan Automobile Manufacturers Association. 2017. http://www.jama.or.jp/lib/invest_analysis/pdf/2016LightTrucks.pdf . Accessed 29 Sept 2017. In Japanese.
3. Survey report on actual use of Kei-cars. Japan Automobile Manufacturers Association. 2016. http://www.jama.or.jp/lib/invest_analysis/pdf/2015LightCars.pdf . Accessed 29 Sept 2017, In Japanese.
4. Mimuro T, Takanashi H. Field operation tests on electric vehicle energy consumption in mountainous and cold district. Int J Autom Technol. 2014;8(5):723–32.
5. About the CO2 emissions record in FY2016 (preliminary figures). The Electric Power Council for a Low Carbon Society. 2017. https://e-lcs.jp/news/fea4404727a5d49115ccc9eb64177317b34fc02e.pdf , Accessed 29 Sept 2017. In Japanese.