Start by prepping the toppings. In a bowl, add the dried wakame seaweed and boil boiling water until just covered. Let the seaweed sit and rehydrate for about 10 minutes until fully bloomed. Drain.
While the seaweed is blooming, heat the neutral oil over medium heat and add the mushrooms. Fry the mushrooms until browned. Remove and set aside.
In a large pot, bring the first 7 ingredients to a simmer. Cover with a lid and turn the heat down to its lowest setting. Keep warm until ready to serve.
Bring a pot of water to boil and add the ramen noodles. Boil for about 3-4 minutes or until the noodles are tender but still have a slight chew. Drain.
To serve, portion out the noodles between two large serving bowls and arrange the wakame seaweed, corn, butter, mushrooms, bamboo shoots and green onions on top.
Give the broth a good stir to remix the miso, and carefully ladle into the bowl. Finish off with chili oil and shichimi togarashi for extra spice if desired, and serve immediately.