Dissolve the buckwheat noodles in water, then blanch them in hot water for 3 minutes.
Clean the perilla leaves with vinegar and finely chop them.
Take out the blanched buckwheat noodles, rinse with cold water, and drain.
Mix the buckwheat noodles with 2 spoons of perilla oil, 1 spoon of tsuyu sauce, and 1 spoon of water.
Top with chopped perilla leaves, pollack roe, and roasted seaweed.