Wash the hijiki thoroughly and blanch in boiling water, then drain.
Rinse the rice and soak it for about 30 minutes.
Finely chop the carrot, shiitake mushroom, and onion.
In a pot, add the soaked rice, blanched hijiki, and chopped vegetables.
Add soy sauce, sesame oil, and salt, then pour water over the rice and ingredients to the appropriate level.
Cook using the rice pot mode or over medium heat.
Once the rice is cooked, mix well and serve in a bowl.