Start by placing the thinly sliced cucumbers in a colander and sprinkle them with salt. Let them sit for about 15 minutes to draw out excess water.
After 15 minutes, rinse the cucumbers under cold water and pat them dry with paper towels.
In a separate mixing bowl, combine the sugar, rice vinegar, soy sauce, sesame oil, minced garlic, and grated ginger. Whisk until the sugar dissolves completely.
Add the cucumbers to the bowl with the dressing and toss well to coat all slices thoroughly.
Stir in the sliced green onions and toasted sesame seeds. Mix gently to combine.
Let the salad sit for about 10 minutes to allow the flavors to meld.
Serve chilled or at room temperature, garnished with fresh cilantro leaves on top.
Notes
Letting the salad sit allows the flavors to meld together.