1. In a 5- to 6-quart pan, bring 1 1/2 quarts water to a boil. Meanwhile, trim surface fat from oxtail. Rinse meat and add to pan. When boil resumes, skim off foam; add wine, anise, ginger, and garlic. Cover and simmer 1 hour.
2. Add regular soy, dark soy, and sugar; cover and simmer 1 1/2 hours. Add daikon; cover and simmer until meat is very tender when pierced, 30 to 45 minutes.
3. With a slotted spoon, put meat and daikon in a bowl; keep warm. Discard the fat from pan juices. Boil juices, uncovered, over high heat until reduced to about 3/4 cup, 10 to 15 minutes, then pour into bowl. Add cilantro; mix. Add salt to taste.