Out of these categories come four types of ramen styles. Shoyu, Japanese for soy sauce, delivers a chintan-style clear soup usually made with chicken, while the cloudy, nearly milk-white broth tonkotsu is made by simmering pork bones for hours. Shio is a light broth made with seafood and liberally seasoned with sea salt, while miso can be made with pork, chicken, or fish stock and is flavored with miso, or fermented soybean paste.