Taishoken is the shop where tsukemen aka dipping ramen originated. I think there was a documentary a year or two ago about the owner who passed away. While Taishoken is the original tsukemen, its less tsukemen and more cousin of the chuuka soba aka chinese noodles with slightly more flavour.
If you like chuuka soba, this might be for you but for me, I'm glad tsukemen has ivolved from to a more delicious flavour. I find chuuka soba just tastes cheap with an instant ramen quality. At least I can say I tried it.