Yoshinogari is the name of a large and complex Yayoi archaeological site in Yoshinogari and Kanzaki in Saga Prefecture, Kyūshū, Japan. According to the Yayoi chronology established by pottery seriations in the 20th century, Yoshinogari dates to between the 3rd century BC and the 3rd century AD. However, recent attempts to use absolute dating methods such as AMS radiocarbon dating have shown that the earliest Yayoi component of Yoshinogari dates to before 400 BC. This archaeological site is of great importance in Japanese and world prehistory because of the massive size and important nature of the settlement and the artifacts found there.