Rinse the rice thoroughly and soak it in water.
Cut the salmon into bite-sized pieces.
Add the soaked rice, water, soy sauce, and mirin into a pot.
Place the prepared salmon and vegetables on top of the rice.
Cover the pot and cook over high heat, then lower to simmer until cooked.
Turn off the heat and let it rest for 10 minutes.
Mix the cooked rice well and serve in bowls.