Soak the seaweed in cold water.
Drain the oil from the canned tuna using a sieve.
Heat sesame oil in a pot and stir-fry the soaked seaweed.
Add the drained tuna and stir-fry together.
Add rice and stir-fry briefly.
Pour in water and bring to a boil.
Simmer over medium-low heat until the rice expands and becomes soft.
Season with salt to taste.