Recommended bowl: Tonkotsu shoyu
The Shofuku ramen shop brand, specializing in tonkotsu shoyu, now has six outposts in Japan. This is the OG flagship, open since 1995. The soup is 100% pork based, boiled for 10 hours before serving. The noodles are house made, and there are a few different styles available. The bowls look IEKEI inspired, but there are no direct connections to any of the official IEKEI shops. Pork chashu, spinach, cabbage, nori seaweed and negi on top. Smooth and satisfying.