Chop the green onions into 1-inch pieces.
To prepare the chicken, remove the bone, tendons, and skin, and cut the meat into small pieces.
Mix mirin, soy sauce, water, and soup stock powder to make a sauce.
Mix 2 eggs gently (If you mix too vigorously, the eggs may not become fluffy)
Heat the pan with oil and stir-fry chicken and green onions for about a minute.
Pour the sauce mixture into the pan and let it simmer for 2 minutes.
Place the egg whites.
Once the egg white is cooked, add the yellow yolk to the pan.
Let it simmer for 1 minute. (To avoid making the edge too hard. High temptress can cause the egg to become too firm)
Place all the cooked ingredients over the white rice. (Including the sauce)