Combine all seasonings and set aside. It will make about 1 cup of seasoning.
Cut the onion lengthwise and then cut it into wedges.
Cut the chicken thigh into small pieces so the chicken will be cooked thoroughly in a short time.
Place a small frying pan over medium heat and pour 1/2 cup of seasoning.
Bring the seasoning to simmer, then add half of the cut onion, and 1/2 of the chicken thigh into the seasoning to cook. (If you are cooking 2 serves in 1 frying pan then add all the onion and chicken)
While the onion and chicken is being cooked, crack the three eggs open into a small mixing bowl and stir the eggs.
After the onion and chicken has cooked for about 5 minutes over medium heat and the seasoning liquid has reduced to about half, pour half of the eggs over the chicken and onion and evenly sprinkle chopped green shallots (optional).
Place a lid on and turn the heat off to allow the remaining heat to cook the egg.
Serve 1 1/2 cup of rice in a Donburi rice bowl and slide the egg and chicken cooked in the frying pan over the rice to serve.
Video
Notes
*1 If you don't have already cooked rice, 1 cup of uncooked rice will make 3 cups of cooked rice. See also cook riceIngredients are for two serves, but you cook one per serve or you cook all in one big pan and divide onto two separate bowls.