I don't tihnk Ajisen Ramen is particularly authentic, but the spaghetti was really good. I found it strange that they used spaghetti noodles, but didn't mind. If you look at it from the point of view of a spaghetti lover, their Tom Yum noodle soup gets a win.
What doesn't get a win, is the claim on Ajisen's website that their food is healthy. It should go without saying that there is nothing healthy about eating a bowl of spaghetti in broth made of pork bone, MSG and spices.