Irontown is a small settlement in Studio Ghibli's film, Princess Mononoke and one of the primary settings. Ruled by Lady Eboshi, it is protected by a lake on one side and high walls surrounding its entirety. Eboshi's militarism has resulted in an ideological clash with the rulers of the neighbouring forest, resulting in San's repeated assassination attempts on her. Ashitaka arrives in town in the middle of this conflict and becomes fairly popular while working to help settle the dispute.
Eventually, Irontown is destroyed due to Lady Eboshi's selfish actions, however Ashitaka goes back to Irontown with the rest of the people and helps them rebuild it. He decides to live there too, and then he can visit San.