空气质量预报
空气质量数据提供者: 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) and the Gunma Prefecture Environment and Forests Department Environmental Conservation Division (群馬県環境森林部環境保全課) (gunma-taiki.jp)
Note that the measurement for CO (carbon monoxide) are taken from the station: Honjo, Ashikaga, Tochigi