Soak buckwheat noodles in cold water for 5 minutes.
Boil chicken breast and shred along the grain.
Julienne cucumber and carrot.
Boil the soaked buckwheat noodles in boiling water for 3 minutes, then rinse in cold water.
Top buckwheat noodles with chicken breast, cucumber, and carrot.
Serve with low-sugar soy sauce.