Dice fresh salmon and tuna into cubes.
Dice onion, cucumber, and avocado into cubes.
Place rice in a bowl.
Top the rice with the prepared salmon, tuna, and vegetables.
Make a sauce with soy sauce, sesame oil, lemon juice, and a bit of wasabi.
Pour the sauce over the top.
Finish by adding seaweed, sesame seeds, and finely chopped kimchi.