Title: Kensetsu rōdō to imin
Subjects: Construction industry, History, Foreign workers, Kensetsu rōdō, Gaikokujin rōdōsha, Gaikokujin(Nihon zairyū), Gaikokujin(Amerika gasshūkoku zairyū)
Places: United States, Japan
Time periods: 20th century, 21st century