Bring a small pot of water to a boil and cook the egg for 6.5 minutes, then immediately transfer to an ice bath, peel, and slice in half.
In a medium pot over medium-high heat, brown the ground pork with the sea salt and black pepper until fully cooked, then remove the pork and set aside.
In the same pot, add the toasted sesame oil, minced garlic, and grated ginger, sautéing for 1 minute until fragrant.
Add the sliced shiitake mushrooms and chopped baby bok choy to the pot, stirring for 2 minutes until they begin to soften.
Pour in the chicken broth, tamari, and sriracha, bringing the mixture to a gentle simmer.
Add the dry soba noodles directly to the broth and cook for 4 to 5 minutes until tender.
Stir the cooked pork back into the soup to warm through, then ladle into a large bowl.
Top the ramen with the soft-boiled egg halves and sliced green onions before serving.