The Aira-Tanzawa eruption happened approximately 22,000 years ago<ref>http://cat.inist.fr/?aModele=afficheN&cpsidt=15297790</ref><ref>J. Edward Kidder, Jr. "Himiko and Japan's Elusive Chiefdom of Yamatai." University of Hawaii Press, 2007. Page 112.</ref> in southern Kyushu. | The Aira-Tanzawa eruption happened approximately 22,000 years ago<ref>http://cat.inist.fr/?aModele=afficheN&cpsidt=15297790</ref><ref>J. Edward Kidder, Jr. "Himiko and Japan's Elusive Chiefdom of Yamatai." University of Hawaii Press, 2007. Page 112.</ref> in southern Kyushu. |