Title: Kakusarete kita "Hiroshima"
Subjects: Asphyxiating and poisonous Gases, War use, World War, 1939-1945, Tōkyō Dai 2 Rikugun Zōheishō. Tadanoumi Seizōshō, Tōkyō Dai 2 Rikugun Zōheishō, Chemical warfare, Environmental aspects, History