Boil the eggs:Bring a pot of water to a boil and gently place the eggs in the boiling water. Let the eggs boil for 6 minutes for the perfect soft boiled eggs.
After 6 minutes, remove the eggs from the boiling water and shock them in ice water. Let the eggs cool completely.
Make the marinade:While the eggs are cooling, make the soy marinade. In the marinating container or a bowl, combine the soy sauce, water, mirin, and sugar. Stir until the sugar has dissolved. If the marinate was made in a bowl, transfer to the container that you'll be marinating in.
Marinate the eggs:After the cooling process, crack and peel the eggs. Rinse with water if needed to remove any stray egg shells. Place the peeled eggs into the prepared marinade and allow the eggs to soak for at last 8 hours, best overnight.
Enjoy the eggs in ramen, as a side, or as a snack. Leftover ramen eggs should be removed from the marinade after 12 to 36 hours, depending on how seasoned you'd like the eggs.
