Cook the soba noodles according to package instructions. Drain and rinse under cold water to stop the cooking process.
Prepare the vegetables: Add cabbage, carrots, bell pepper, green onions, and cilantro to a large mixing bowl.
Make the dressing: In a small bowl, whisk together soy sauce, rice vinegar, sesame oil, honey, ginger, garlic, lime juice, and red pepper flakes.
Assemble the salad: Add cooled noodles to the vegetables. Pour dressing over the top and toss until everything is evenly coated.
Serve: Sprinkle with toasted sesame seeds and adjust seasoning to taste. Enjoy immediately or chill for 20–30 minutes.