Slice cucumbers thinly and salt them, allowing them to sit for 10 minutes so excess moisture is released and the texture remains crisp.
Whisk together rice vinegar, soy sauce, sesame oil, sugar, and chili oil until the dressing becomes smooth and well combined.
Add finely minced garlic and grated ginger into the dressing, ensuring they are evenly incorporated for consistent flavor.
Drain the cucumbers thoroughly and toss them gently with the dressing so each slice is evenly coated.
Let the salad rest briefly so the cucumbers absorb the dressing without losing their crunch.
Garnish with sesame seeds and green onions just before serving to maintain freshness and texture.