Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Zama is a city located in central Kanagawa Prefecture, Japan. The city is also home to the United States'' Camp Zama Army base. As of 2009, the city has an estimated population of 128,667 and a density of 7,320 persons per km². The total area is 17.58 km². Located in central Kanagawa prefecture, the city is mostly flat, although some parts are hilly. The Sagami River, Mekushiri River, and the Hato River flow through Zama. It is well known for its drinking water, which is cold in the summer and warm in the winter.