Tonchin Taipei Zhongshan Restaurant is a Japanese ramen shop in Zhongshan, Taipei, serving tonkotsu ramen, mala ramen, and mala tsukemen. Its signature broth adds soy sauce and fish notes to tonkotsu, and noodle portions come in large, medium, and small sizes. During peak hours, the wait to get in can run about 30 minutes. The broth is generally on the salty side.