Tonkotsu Gyokai Tsukemen at Rokurinsha in Tokyo Ramen Street
Tsukemen (normal size), with additional egg.
Rokurinsha is the most popular restaurant at the underground Tokyo Ramen Street (in the basement of Tokyo Station). There is a line at every hour of the day (even when the other shops in the Street are half empty): I had to wait ~20min in the middle of the afternoon. In the end, I was somewhat disappointed: It was good but the soup was pretty standard for tonkotsu gyokai and it got cold after just a few dips. For me at least, TETSU and Fuunji are still the standards for fish-based tsukemen.