former city, Chiba ken (prefecture), Honshu, Japan, on the lower Tone River. In 2006 it merged with a number of nearby communities to form the new city of Katori. From the 17th to the early 20th century, Sawara was a commercial centre and river port whose importance was enhanced by the construction of the Narita Line (railway) to Tokyo (1898). Subsequent changes of the traffic network, however, have brought a decline in the city's function as a market. Major products are rice, soy, and sake (rice wine).

Katori city serves as a gateway to Suigo-Tsukuba Quasi-national Park. The city contains the former residence of its native son Inō Tadataka (1742–1818), who surveyed and mapped Japan's entire coastline. Pop. (2005) Katori, 87,332.