Two bronze dōtaku (ritual bells), Yayoi period (about 300 BC-AD 300), Japan.
The origin of the dōtaku is thought to be the Chinese cattle bell. However, the Japanese did not practise cattle farming, so the first bells must have been imported as ritual objects. The fact that they are often found buried on isolated hill-sides and show evidence of having been buried and dug up several times, suggests their use in an agricultural ritual. - britishmuseum.org