Make soup first. Cut green onions in halves. Crush garlic and peel skins. Slice ginger root. In a large pot, put chicken broth, green onions, garlic, and ginger, and cook covered for 10 minutes. Strain. Season with Soy Sauce, Sake, Mirin, salt, and sesame oil. Keep warm on low heat, covered.
Prepare the toppings. Rehydrate Wakame in hot water. Let it sit for 5-10 minutes. Then squeeze out water. Slice green onion diagonally and thinly. Set aside.
Strain corn from a can, and remove excess moisture with a paper towel. Melt butter in a frying pan, add corn, and cook for a couple of minutes. Season with salt and pepper. Remove from heat and set aside.
Once everything else is ready, cook dried Chukamen according to the package. Divide the noodles in half and place them in large bowls. Pour the hot soup over the noodles and top with Wakame seaweed, green onion, corn, and butter. Serve immediately.