Cook the chicken – Start by cutting the chicken into bite-sized pieces, removing the excess fat. Season the chicken with salt and pepper. In a pan, cook the chicken thoroughly, about 3-4 minutes on each side. Set the cooked chicken aside.
Make the tare – Mince the garlic and ginger into small pieces, then sauté in the saucepan with the sesame oil for 1-2 minutes, or until fragrant.
Simmer the broth – Add in the chicken broth with the kelp, soy sauce, mirin, sugar, bonito flakes, and onion. Let simmer for about 5-10 minutes.
Cook the noodles – In a separate pot, cook the noodles according to the package instructions.
Assemble the bowl – Strain the stock. Add the noodles into a bowl and pour the stock over it. Top with the cooked chicken, roasted seaweed, egg, furikake, togarashi, and scallions, along with any other additional toppings you’d like.