Gunsan opened its port in 1899. It was one of four cities – along with Incheon, Mokpo, and Busan – that had been designated for foreign trade under the 1876 Treaty of Ganghwa with Japan. Throughout the Japanese colonial period, it served as an extraction outpost, syphoning rice from the Honam Plain to the Japanese mainland, and stood among the nation¡¯s most prosperous cities. The urban plan followed a grid of roughly 70 ¡¿ 100m, a framework that remains intact to this day. Since the 1990s, as housing shifted towards apartment complexes and towers, development pushed outward to the city¡¯s edges, creating its current expanded form. Like many mid-sized cities found across Korea, Gunsan was not spared the hollowing out of its historic centre.