Had lunch at Jin Ramen on Amsterdam yesterday, where I've always assumed the noodles are homemade because a) they taste great and b) there are pictures on the walls of people making noodles. As I was paying, I asked my server if they made their own noodles and he confirmed that they do at their bakery, Chokolat, which is right by Jin's uptown location on 125th. I then remarked that aside from Jin, I didn't know of any ramen shops making their own noodles, aside from Ippudo. The waiter then looked at me with a puzzled expression and told me that Ippudo no longer makes their own noodles in-house. I was confused, because I know they used to make all their noodles at their East Village shop, and I think I remember them saying that once Ippudo Westside opened, all noodle making moved there. Or maybe it didn't, and noodles were still made in the EV and shipped to Westside... or vice versa.
Anyways, the server then went to check with the someone who looked like owner, who was an old school Japanese gentleman. He confirmed that Ippudo no longer makes their own noodles, with Sun Noodles handling that responsibility and making them according to Ippudo's recipe. He also said that Totto Ramen once made their own noodles, but now has Sun Noodles do theirs as well. I was also told that the guy who used to make noodles at Totto now makes them for Jin.
I then asked him if there are any other places that make their noodles in-house. The owner said that as far as he knows, there's one spot in Brooklyn Heights, on Henry & Cranberry, which is run by a friend of his. He couldn't remember the name, but a Google search turned up Kogane Ramen at 76 Henry Street.