Place nori sheets on top of the rice. Shred the imitation crab and cut it into smaller chunks. Shred the cooked and cooled salmon and add to the bowl with the shredded crab.
Spread the shredded salmon and crab mixture on top of the nori sheets and press down gently until even. Sprinkle with furikake, sesame seeds and drizzle with the soy sauce and remaining spicy mayo.