Bring a large pot of water to a boil and cook the soba noodles according to the package directions. Drain them in a colander and rinse under cold water until completely cool.
In the same pot, cook the edamame in boiling water for 4 minutes. Drain and rinse under cold water to cool.
In a large mixing bowl, whisk together the soy sauce, sesame oil, rice vinegar, and grated ginger until smooth.
Add the cooled noodles, edamame, and sliced green onions to the bowl. Toss gently until everything is evenly coated with the dressing.
Sprinkle the sesame seeds over the top and give the salad one final light toss before transferring to a travel container.