Gujeong Mandu Kalguksu is a long-standing Korean restaurant in Sinsa-dong, Gangnam-gu, Seoul, serving kalguksu, mandu, sujebi, and cheonggukjang barley rice. The kalguksu always contains clams, and diners can add dadegi according to preference. It is closed on Sundays, and at lunch it fills with office workers from the surrounding area; parking is available. During lunch hours the kitchen is busy, so responses to orders are slow.