Momofuku's Soy Sauce Eggs recipe from Food52. I used half teriyaki sauce and half Bragg's soy sauce alternative. Couldn't find sherry vinegar so I used rice vinegar. Marinated for 2hrs. Tasty! 6TBS warm water, 1TBS sugar, 2 TBS sherry vinegar, 3/4C soy sauc, 6 eggs, black pepper. Boil eggs to desired doneness, marinate them in the fridge turning here and there.
The most important parts of ramen are the noodles and the broth, but that doesn't mean you should forget about toppings. One of the most classic options is ajitsuke tamago, a runny soft-boiled egg marinated for hours (at least four and up to twelve) in a mix of soy sauce, sake, mirin, and sugar.