Boil water in a medium pot and cook soba noodles according to package instructions, adding chopped bok choy for the final 60 seconds of cooking.
Drain the noodles and bok choy, then set aside.
In a small mixing bowl, whisk together the tahini, tamari, chili oil, rice vinegar, and 1 tablespoon of warm water until the sauce is smooth and creamy.
Place a large non-stick skillet over medium-high heat and add the ground pork, sea salt, and black pepper.
Sauté the pork while breaking it into small crumbles with a wooden spoon until it is fully browned and cooked through.
Add the minced garlic and grated ginger to the skillet, stirring constantly for 1 minute until fragrant.
Add the cooked noodles and bok choy into the skillet with the pork.
Pour the prepared tahini sauce over the mixture and toss well to combine until every strand is coated and the dish is heated through.
Divide into a bowl and garnish with thinly sliced green onions.