200 mL dashi (prepared volume, not raw ingredients)
  4 T Japanese soy sauce
  2 T sake (must equal half of soy sauce)
  2 T mirin (must equal half of soy sauce)
  2 T sugar (should equal half of soy sauce)
  2 smallish (yellow) cooking onions (or 1 medium), thinly sliced
  1 skinless, boneless chicken leg (about 350 g), cut into small bites
  4 large eggs, thoroughly mixed in two bowls each with 2 eggs
  4 bowls of steamed rice
  1 or 2 green onions, thinly sliced
  a few small sheets of nori (dried laver seaweed), cut into slivers
 
  If you’re making dashi from dried ingredients from scratch
  (which you should do, because it's cheap and easy),
  the first thing you should
  do is to bring 200 mL of water to a boil, then turn off the heat, and
  let the dashi ingredients (dried mushrooms, kelp or cured bonito flakes)
  steep while you prep the rest of the ingredients.
  Then when dashi is called for, strain the water directly into the frying
  pan.
  Add dashi, soy sauce, sake, mirin and sugar directly to a large
  frying pan, apply medium high heat, stirring occasionally until
  sugar dissolves.
  Reduce to medium heat.
  Add the chicken, spreading it out evenly across the pan.
  When the bottoms of the chicken pieces are no longer raw, 
  add the yellow onion, again being careful to spread them evenly across
  the pan.  Then quickly flip all the chicken pieces over to start
  cooking their other sides.  Cook covered for about two minutes.
  When you don't see anymore raw parts of chicken, make sure again
  that the chicken and yellow onion are evenly distributed across
  the pan, and if as is likely the onion has cooked less than the
  chicken at this point, quickly pick up the chicken pieces and
  spread them across the top of the onions.  Pour one bowl of eggs
  evenly around the pan.  Getting the eggs even is the trickiest
  part of the recipe, as it’s hard to move them around if
  you get too much in one part of the pan and not enough in another.
  Cook covered for another two minutes or so.
  When the eggs are set, turn the heat down to medium low, add the
  remaining eggs, again being careful to spread them as evenly as
  possible.
  Cook covered until the remaining eggs are cooked but still runny.
  Serve immediately over a bowl of rice, garnish with green onions
  and nori.
  Remove from heat, pour onto bowls of rice. Garnish with green onions
  and nori.