Boil eggs for 7 minutes, shock under ice water and peel.
Add the peeled eggs to a bowl with mirin and soy sauce.
Marinate for 2-4 hours.
Before serving, halve the eggs lengthwise.
For the Ramen Broth
Lay out the scallion whites and ginger on a heat proof pan. Char with a blowtorch until evenly charred.
Bring water up to a boil in a large pot.
Add kombu, shitake mushrooms, and mushroom dashi powder, and simmer for 30 minutes.
Remove the kombu, add the scallions and ginger, and simmer for another 1.5 hours.
Strain the broth into a small pot, reserving the mushrooms.
Slice the mushrooms and set aside for the Noodle Bowls.
For the Noodle Bowls
Cook the noodles as per package directions (al dente-ish).
Mix the miso, soy sauce, chili oil, and mirin until well combined (may be done ahead, if preferred), add a spoonful of the mixture to each of 4 bowls.
Ladle hot broth into the bowls and use a small spoon to stir the miso mixture into the broth.
Add noodles, halved eggs, bamboo shoots, reserved sliced shiitake mushrooms, wood ear mushrooms, scallion greens and corn to each bowl. Serve hot and enjoy!