sentences:  The company was promoted as the ""Mantetsu" of the South" in hopes that it would be as successful and as profitable as the South Manchuria Railway Company.Matsue was a fervent supporter of the "Nanshin-ron" doctrine, which advocated Japanese territorial expansion and colonization of the islands of Oceania and eventually the European-held territories of the Indonesian archipelago.Building on the resources of the defunct "Nan'yō Shokusan", Matsue was able to build a substantial empire supported by the sugar industry during the 1920s and 1930s.