data seto japanSeto, city, Aichi ken (prefecture), central Honshu, Japan, northeast of Nagoya. Seto, established about 1230, is known for its porcelain (Seto ware). Since the Meiji period (1868–1912),Seto City is located in a northwest inland part of Aichi Prefecture and boasts excellent accessibility to an airport, harbor, and railways. For a long time, the City has grown