On my way back from Australia, I stayed in Incheon rather than Seoul. It was closer to the airport and turned out to be a good move. The town was a walkable size with a lush park and history connected to the Japanese and Chinese.
Away from the main highway, there were narrow streets with little traffic. I passed a Japanese bank and shops that I couldn’t resist entering. There was even a small Chinatown. Further along was a stairway that marked the boundary between where the Japanese and Chinese lived – and never the twain shall meet I gathered from what was written on the plaque.