Gen Ramen in Fremont now has three different kinds of broth - shio (salt), shouyu (soy sauce), and tonkotsu (pork bone). The previous broth is now called tonkotsu. There are a ton of topping choices too - e.g. stir-fried leek, pork kakuni (belly meat), bean sprouts, etc. I tried the shouyu. It's a thicker shouyu broth than Himawari or Dohenkotsu, but much thinner than their tonkotsu. I liked it better than Halu's shouyu ramen. I smelled some garlic in the oil on top. I recommend mixing the broth well before taking sips, since the oil on top tends to over-power the flavor in these types of ramen.
Give it a try and let me know what you all think!