In a large bowl, combine the sliced cucumbers and salt. Toss to coat and let sit for about 10 minutes to draw out excess moisture.
In a separate bowl, whisk together the rice vinegar, soy sauce, sugar, sesame oil, grated ginger, and minced garlic until the sugar is dissolved.
Drain the cucumbers and gently pat them dry with paper towels.
Add the cucumbers to the dressing and toss to combine.
Sprinkle with sesame seeds and chopped green onions before serving.
For the best flavor, let the salad chill in the refrigerator for at least 15 minutes before serving.