Title: Chikuhō, Gunkanjima
Subjects: Kōzan rōdō, Korean Foreign workers, Chōsenjin(Nihon zairyū), Kyōsei rōdō, Forced labor, Hashima(Nagasakiken), Chikuhō tanden, Social conditions, Coal mines and mining, Coal miners, History
Places: Japan, Kyūshū Region
Time periods: 20th century