ou bien localiser la station de mesure de la qualité de l'air la plus proche |

Air Quality Data provided by the Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム) (soramame.env.go.jp)
Note that the measurements for CO (monoxyde de carbone) and O3 (ozone) are taken from the station Tomihisamachi, Matsuyama, Ehime