Soba Noodle Salad

2 bundles of soba noodles, cooked according to package directions
1 cup Oriental-style ginger soy salad dressing
6 thinly sliced radishes
2/3 cup chopped onion
2/3 cup chopped celery
6-8 thinly sliced olives
2 tsp sesame seeds

Combine all ingredients except sesame seeds in a large bowl, tossing well. Chill for at least an hour. Sprinkle with sesame seeds just before serving.