And, from the late 1990s, studies of Tokujun (卓淳, in Changwon), Alla (in Haman) and other regions were promoted mainly from the archeological aspect and since the Songhakdong No. 1 tomb in Gyeongsangnam-do (66 meters in length) was announced as a large keyhole-shaped tomb mound in 1983, the same type of tombs have been unearthed one after another in the southwest part of the Korean Peninsula, totaling eleven in South Jeolla Province and two in North Jeolla Province so far.
また、1990年代後半からは主に考古学的側面から、卓淳（昌原）・安羅（咸安）などの諸地域の研究が推進される一方で、1983年に慶尚南道の松鶴洞一号墳（墳丘長66メートル）が前方後円墳であるとして紹介されて以来相次いだ朝鮮半島南西部での前方後円墳の発見これまでのところ全羅南道に11基、全羅北道に2基の前方後円墳が確認されている。