01 - Begin cooking rice if not already prepared. Cut chicken into bite-sized pieces, slice onions, and beat eggs in a mixing bowl.
02 - In a large, deep skillet or donabe, combine dashi stock, soy sauce, mirin, sake, and sugar. Stir over medium heat until sugar dissolves and mixture reaches a gentle simmer.
03 - Add sliced yellow onions to the simmering sauce. Cook for approximately 3 minutes until onions begin to soften and become translucent.
04 - Layer chicken pieces evenly over the softened onions. Cover with a lid and simmer for 6–8 minutes until chicken is fully cooked through, reaching an internal temperature of 165°F.
05 - Pour beaten eggs evenly over the chicken and onion mixture. Cover again and cook for 1–2 minutes until eggs are softly set but still slightly runny, creating a creamy texture.
06 - Spoon hot Japanese rice into individual serving bowls. Gently slide portions of the chicken, egg, and savory sauce over the rice in each bowl.
07 - Top each bowl with fresh sliced spring onions. Serve immediately while eggs remain creamy and rice is piping hot. Accompany with Japanese beer or green tea if desired.