Place a sheet of dried seaweed for gimbap on a cutting board.
Mix the rice with salt and sesame oil.
Spread the rice evenly over the seaweed.
Drain the oil from the canned tuna and mix well with mayonnaise.
On top of the rice, add tuna mayo, cucumber, pickled radish, carrot, and imitation crab stick.
Roll up the ingredients with the seaweed using a gimbap mat.
Slice into bite-sized pieces.