Photograph: Paul Wagtouicz | Terakawa Ramen at Terakawa RamenBroth: Tonkotsu (three kinds of pork bones---head, backbone and knees---are cooked for a minimum of 14 hours, and then left to sit for at least 12 more hours)Noodles: Straight, thin noodlesToppings: Roasted pork belly, kiku