Butaboshi is very highly ranked. 98.41 on the Ramendb, which is impressive.
When I arrived, I instantly understood. The Ramendb is heavily weighted by Jiro lovers, and Butaboshi is Jiro-style.
The only thing thicker than the noodles is the soup. Scratch that, the chunks of pork are thicker still.
I'm not a fan of this style, and I felt bad for leaving what looked like half the bowl when I left. But, as I know from experience, the human body is not meant to overeat ramen of this caliber.
Try it for yourself, but only if you are a fan. The location is out of the way.
Another warning, you will stink after this one. Garlic and rendered pork fat. But some people love that sort of thing.
Kanagawa-ken, Kawasaki-shi, Nakahara-ku, Otsuki 4-5-20
Closest station: Hiyoshi