Cut the chicken into bite-sized pieces.
Slice the onion thinly.
Stir-fry the chicken and onion in a pan.
Add soy sauce, mirin, sugar, and kombu broth, and bring to a boil.
Beat the eggs and pour them into the pan.
When the eggs are half cooked, turn off the heat and let it rest covered for a moment.
Serve the cooked mixture over rice to finish.