Wash the rice thoroughly and soak it.
Finely chop tuna, carrot, and onion.
Heat sesame oil in a pot and stir-fry the tuna, carrot, and onion.
Add the soaked rice and stir-fry together, then pour in water.
Once it starts to boil, reduce to medium-low heat and cook while stirring.
When the rice grains become soft and plump, season with salt.
Serve in a bowl and top with chopped green onions and seaweed flakes.