On the land side, just to the east of Diamond Head is the upmarket suburb of Kāhala. Following are several affluent hillside suburbs like Hawaii Loa Ridge, a gated community that occupies an entire slope. In the east is the suburb of Hawaii Kai, built by industrialist Henry J. Kaiser after World War II. Hawaii Kai has a marina, shopping centers, including a Costco branch, and numerous restaurants such as the well-known Roy's and an offshoot of the Hawaiian brewery Kona Brewing Co.. On the headland leading to Koko Head is the suburb of Portlock, which belongs to Hawaii Kai.