Shred the cabbage.
Julienne the carrots and lightly sprinkle with salt to soften.
Beat the eggs and make an egg omelet sheet.
Drain the oil from the canned tuna, then mix with mayonnaise, salt, and pepper.
Place seaweed on a bamboo mat and evenly spread rice over it.
Layer cabbage, carrots, egg sheet, and tuna on top of the rice in that order.
Roll up tightly from the end.
Cut into bite-sized pieces to serve.