Place eggs in a small sauce-pot, and cover with cold water. 

Bring eggs to a boil. Immediately turn off the heat, cover and set a timer for 7 minutes. 

Gently move eggs to a bowl of ice water and allow them to cool for 10 minutes.   

In a small bowl, whisk soy sauce and mirin. Place whole boiled eggs in the mixture and marinate for at least 2 hours and up to 3 days. 

Peel, cut eggs in half, and serve with ramen.