Slice the cucumbers thinly and place them in a colander. Sprinkle with a pinch of salt, toss gently, and let sit for 10 minutes to draw out moisture.
While the cucumbers drain, whisk together rice vinegar, soy sauce, sesame oil, honey, and grated ginger in a small bowl until smooth.
Rinse the cucumbers under cold water to remove excess salt, then pat them dry with a clean kitchen towel or paper towels.
In a large mixing bowl, combine the drained cucumbers, edamame, red onion, and toasted sesame seeds.
Pour the dressing over the salad ingredients and toss everything together until evenly coated.
Let the salad rest for 5-10 minutes to allow the flavors to meld before serving.