Thinly slice the cucumbers. I like to use a mandolin, but you can also slice evenly by hand with a knife.
Sprinkle salt over the cucumbers and let them sit for 10 minutes while you prepare the dressing. At the end of the 10 minutes, drain the liquid released from the cucumbers.
To make the dressing, whisk together the rice vinegar, soy sauce, sesame oil, honey, ginger, chili flakes, and toasted sesame seeds.
Add cucumbers, green onions, and dressing to a bowl, and toss to coat. Chill in the refrigerator for 20 minutes to allow the flavors to meld.
Serve chilled. Salad is best fresh but can be saved for up to 2 days.