This video, titled "Menya Musashi｜Shinjuku Flagship Store｜Nishi-Shinjuku, Shinjuku, Tokyo｜Kakuni Tsukemen｜Standard" (麺屋武蔵 新宿総本店　東京都新宿区西新宿　角煮つけ麺 並), was released by "Nationwide Ramen Videos" (全国ラーメン動画).

This video introduces Menya Musashi with the motto "no two shops have the same flavor."
Their Shinjuku flagship store serves a double broth of "animal-based soup" and "seafood-based soup" which is mainly made with chicken and pork bones.
However, the Ikebukuro branch offers ramen that is mainly deep-fried toppings, and the Okachimachi branch uses tonkotsu soup as its base, and offers three colors of ramen: white, red, and black, showing that each shop is completely different.

In this video, you can see a sample of the Kakuni Dipping Ramen served at the Shinjuku flagship store, so if you're interested, check it out!