Jumunjin Makguksu in Busan serves house-made buckwheat makguksu and kalguksu. The buckwheat mul makguksu combines Korean buckwheat noodles with a chilled, tangy broth, while the bibim makguksu is seasoned with a house sauce. The buckwheat deulkkae kalguksu sells more than one hundred bowls a day in winter, and the muksabal is made from 99 percent Korean Bongpyeong buckwheat. Food comes out quickly, and takeout, group seating, and reservations are available.