Clean and thinly slice the skate sashimi.
Prepare the cold noodle broth in advance and chill it in the refrigerator.
Julienne the toppings such as cucumber, pear, and radish.
Boil the noodles in boiling water, rinse in cold water, and drain thoroughly.
Place the noodles in a bowl, pour in the cold broth, and top with the vegetables and skate sashimi.
Add mustard, vinegar, or sugar to taste before serving.