Seongchodang is a sushi restaurant in Jochon-dong, Gunsan. It serves thick-cut flounder, salmon, and tuna sushi along with aged hoe, and a soba set is available at lunch. Four parties were waiting at 4:30 p.m., with entry after 4:50 p.m. in one case. The sushi and the udon broth are on the salty side.