For the Dressing: In a small bowl, whisk the dresing ingredients together until smooth. Taste for seasoning and salt and pepper as needed. Set aside.
For the Salad: Shred the crab sticks by hand and place in a large bowl. Shred the cucumber and mango in a food processor (or julienne by hand) and place in the bowl.
Toss with the dressing and top with panko immediately before serving.