We tried out this restaurant a few weeks ago when we were in a ramen noodle mood...
For ramen, you can select one of the three basic bowls:
tonkotsu ramen (pork broth), tonkotsu shoyu (pork broth with soy sauce), and tonkotsu kotteri (pork broth, oilier)
If you pick any of the other ramen dishes, you get to pick one of the three broths above as your base flavoring, prior to all the extra ingredients you get from your menu selection.