Shred or crumble the crab meat. Dice the cucumber and avocado into small, even pieces for the best bite.
In a small bowl, combine the mayonnaise, soy sauce, wasabi, honey, and lemon juice. Mix until smooth.
Add the vinegar, sugar, and salt to the warm rice. Stir quickly to coat evenly without mashing the rice. Sprinkle with furikake, if using.
Arrange the crab, avocado, and cucumber over the rice. Drizzle with the wasabi mayo sauce.
Serve with a seaweed snack and extra soy sauce and wasabi on the side for dipping.