Julienne the cucumber and carrot.
Boil the soba (buckwheat noodles) in boiling water, then rinse them under cold water.
Place the cooked noodles in a bowl.
Top with vegetables, seaweed flakes, and a boiled egg.
Mix soy sauce, perilla oil, vinegar, and sugar to make the sauce.
Evenly pour the sauce over the noodles.
Finally, sprinkle with sesame seeds to finish.