Ajitsuke Tamago Ramen Eggs. We like these with Ramen bowls, on chilled noodle salads, with sticky rice, as a snack. They are very easy to make. I like the eggs soft boiled, my middle child likes the eggs medium set. So, cook the eggs to your liking.
Play with the spices you add to the marinade as well. Try five spice, make them spicy, leave out all the spices. Also adjust the water to your liking. Less water, the eggs will be more salty. Time spent in the marinade will also determine how salty the eggs are.
It is not necessary to move the eggs around in the marinade as long as they are covered. If you don't mind white spots on the eggs from where they are touching the sides of your container and each other just put them in the marinade and put them in the fridge. If the white spots will bother you, move the eggs around so they are evenly colored.
I make the eggs in the Instant Pot because it gives me consistent results. It doesn't matter how you cook your eggs, as long as they are cooled and peeled.