city, Kanagawa ken (prefecture), Honshu, Japan, stretching between Tanzawa-yama (Mt. Tanzawa; north; 5,141 ft 【1,567 m】) and the Hadano basin (south). It was a regional commercial centre during the Tokugawa era (1603–1867), when the cultivation of tobacco was introduced. The city is now a tobacco-trading centre, containing a processing plant of the Japanese Monopoly Bureau. Because of its convenient road and rail connections to Tokyo, Hadano is included in the Keihin Industrial Region. It is the gateway to Tanzawa-Oyama Quasi-national Park; Tsurumaki Spa lies within the city boundary. Pop. (2005) 168,317.