館山市 (Tateyama City) is located in Chiba Prefecture, Japan, along the eastern coast of the Bōsō Peninsula. It is known for its beautiful beaches, such as Tateyama Beach, and scenic views of the Pacific Ocean. The city has a rich history, with several historical sites, including the Tateyama Castle ruins. The area is also famous for its fresh seafood, particularly Tateyama's tuna, which attracts many visitors. Additionally, Tateyama City offers various outdoor activities, such as hiking in the nearby Awa Mountain Range and enjoying water sports along the coast.