Ichiran's signature tonkotsu broth is blended with four carefully selected chili peppers. The result is a perfect balance of stimulating spiciness and the rich, savory flavor of tonkotsu. The key to Ichiran's flavor lies in its secret sauce. By adding this sauce to the broth, you can experience not only spiciness but also a deeper umami flavor, resulting in the perfect Ichiran Tonkotsu Ramen.