My wife and I recently visited newly opened MaMa Ramen on Crenshaw and Lomita near In and Out Burger in Torrance. We think they have the best shoyu (soy sauce) ramen we've tried in the area here. The cha shu pork they use is especially tasty. Apparently, the restaurant is part of a branch that is pretty famous in Japan. At any rate, this branch here is usually packed with Japanese nationals. Worth a try for any noodle lovers out there.