Tateyama (館山市, Tateyama-shi?) is a city located in Chiba Prefecture, Japan. As of April 2012, the city had an estimated population of 48,775 and the population density of 443 persons per km². The total area was 110.21 km². The popular television drama Beach Boys, which originally aired on Japanese television in the summer of 1997, was filmed largely in Tateyama.