The soup at Ikaruga is so thick and creamy that you might believe it contains milk or butter. In reality, the wonderful texture of the tonkotsu broth is the result of pork bones simmered for hours upon hours. Among the restaurants on the Tokyo Ramen Street, a collection of ramen shops in the basement of Tokyo Station, Ikaruga is the most upscale. The staff are dressed in sharp uniforms and speak in (relatively) gentle tones.
Tokyo Ichiban-gai B1, 1-9-1 Marunouchi, Chiyoda-ku