In a small bowl, whisk together rice vinegar, tamari, sesame oil, grated ginger, grated garlic, and maple syrup to make the dressing. Set aside.
Cook soba noodles according to package directions. Drain and immediately rinse with cold water until completely cool.
Toss the cooled noodles with the prepared dressing and divide evenly into serving bowls.
Arrange avocado slices on top and squeeze with lemon juice to prevent browning.
Add blanched snap peas, edamame, thinly sliced radish, and fresh mint leaves to each bowl.
Sprinkle with sesame seeds and serve with additional tamari or sesame oil if desired.