Yayoi period
In 1963 a local man discovered a stone ax dating to the mid-Yayoi period (300 BC–250 AD) in his farm plot in the Kawachi neighborhood. Upon further investigation by the Japan Archaeological Society in 1986, the area was recognized as containing the remains of a . This is a type of settlement usually located several tens of meters above the surrounding area on mountainsides, and is peculiar to the Yayoi period.