Method

1. Make the Broth (optional): If using pork bones, roast them in the oven at 400°F (200°C) for 30 minutes. In a large pot, combine roasted bones, onion, garlic, ginger, soy sauce, mirin, and water. Bring to a boil, then reduce heat and simmer for 1-2 hours. Strain the broth and discard the solids.
   
   
2. Cook the Noodles: Cook the ramen noodles according to package directions. Drain and rinse with cold water.
   
   
3. Assemble the Ramen: Divide the cooked noodles among four bowls. Ladle hot broth over the noodles. Top with chashu pork, soft-boiled eggs, green onions, sesame seeds, and nori seaweed (if using). 
   
   
   

Note: This is a basic recipe. You can customize it by adding other ingredients such as:

* Arame: A type of seaweed * Bamboo shoots: Canned or fresh * Menma: Bamboo shoots preserved in brine * Wakame: Seaweed