Hmm, restaurants from Japan have opened locations in SF though. E.g. Hinodeya, Mensho, Tsuta. Did you feel even those weren't authentic?
Similarly, Crystal Jade (RIP) re Chinese food.
Similarly, Crystal Jade (RIP) re Chinese food.
I can remember specifically a very small hole-in-the-wall place in Yokohama that seats maybe 8-10 people (although I suppose that's par for the course for ramen shops). You could choose how rich you wanted the broth to be.
There are many different preparation styles.