Wash and soak beans overnight, if possible, or boil for five minutes and soak for two hours. Discard soaking water. Place beans in a pot and bring to boil with a stick of kombu seaweed. Turn flame down, cover, and simmer for two hours, or until beans are soft. Once soft, add the vegetables, and simmer another twenty minutes. Add miso during last few minutes of cooking. Simmer but do not boil the miso. Serves 4.