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),The Setouchi Triennale is one of the country's foremost contemporary art festivals, held every three years on the islands of the Seto Inland Sea. The 100-day festival, which