Julienne the cucumber and carrot.
Dice the tofu into small cubes and blanch in boiling water.
Drain the oil from the canned tuna using a sieve.
Place the rice in a bowl.
Neatly arrange the cucumber, carrot, tofu, and tuna on top of the rice.
Serve with sauce (gochujang, sesame oil, sesame seeds, etc.).
Mix everything well and enjoy.