Hakata ramen is a popular variation of tonkotsu ramen that originated in Fukuoka, Japan. The broth is made with pork bones that are simmered for hours to extract all the flavors and nutrients from the bones. The noodles used in hakata ramen are usually thin and straight, and the dish is often served with slices of tender pork, green onions, and pickled ginger. Hakata ramen is a hearty and satisfying meal that is perfect for cold winter days.