Soak the dried seaweed in water and chop it finely.
Drain the tuna in a sieve to remove the oil.
Add sesame oil to a pot and stir-fry the tuna and seaweed.
Add soaked rice and stir-fry together.
Pour in water (or broth) and bring to a boil.
Simmer on medium-low heat, stirring, until the rice softens and thickens.
Season with soy sauce and salt to taste.