Toast the sesame seeds in a pan on medium-low heat for approx. 10 minutes or until seeds are golden.
In a small bowl, whisk together the Kikkoman soy sauce, sesame oil and wasabi paste.
Drizzle the soy sauce mixture over the cucumber noodles and toss to coat.
Place in a bowl or on a plate and top with avocado slices, cut up crab, strips, and strips of seaweed.
Drizzle with more Kikkoman soy sauce if desired.
When the sesame seeds are nicely toasted, sprinkle them over the salad.