Odawara, city, southwestern Kanagawa ken (prefecture), east-central Honshu, Japan. It is located on the coast of Sagami Bay, between the Sakawa and Haya rivers, about 28 miles (45 km) southwest of Yokohama. The city was a local political centre during the Kamakura era (1192–1333), and in the early 15th century a castle was built there. Consequently, Odawara grew to be an economic and cultural hub of the southern Kantō region. It served as a post town on the Tōkaidō (Eastern Sea Highway) during the Edo (Tokugawa) era (1603–1867). Since the late 19th century the traditional manufacture of foods and textiles has been industrialized, particularly in the Sakawa River area, and the city has become a residential suburb of the Tokyo-Yokohama metropolitan area.
Odawara is a gateway to the Hakone resort area to the south. Its castle, restored in 1960, lies in a public park renowned for its apricot and cherry trees. At the entrance to the park is the Hotoku Ninomiya Shrine, dedicated to the agronomist Ninomiya Sontoku, who was born in the Odawara area. Pop. (2005) 198,741; (2010) 198,327.