A shipwreck discovered in South Korea's southwestern waters last year was found to date back to the early Joseon Dynasty in what is believed to be the nation's first discovery of a Joseon-era ship, a research institute said Wednesday.

After a four-month study into the Mado No. 4 ship, the National Research Institute of Maritime Cultural Heritage announced that it believes the ship carried rice collected as tax by provincial governments to the capital Seoul in the early years of the Joseon Dynasty (1392-1910).

The ship was discovered in the seabed off Mado Island, Taean County, South Chungcheong Province, in April last year along with some 140 "buncheong-ware" ceramics from the Joseon era.

The conclusion is based on the relics, including the ceramics and wooden tablets, recovered from the shipwreck and the ship's relatively solid structure, the research institute said.

Buncheong refers to ceramics with a gray or bluish-green body, decorated with white. It is associated with the earlier part of the dynasty.

Three of the roughly 140 ceramics from the ship had the word "Naeseom" inscribed on them, which was a government office in charge of managing items for use in palaces, according to the institute.

Also among the relics were some 60 wooden tablets that mostly have the words "Naju" and "Gwangheungchang" written on them, meaning the ship departed from the city in South Jeolla Province headed to Gwangheungchang, the name of a major rice granary during the period.

"We believe the ship sunk in waters off Mado Island while heading to Gwangheungchang carrying goods from Naju in the period ranging from the 1410s to 1420s," the institute said.

Excluding Mado No. 4, 13 ancient shipwrecks have been found in South Korea up until now. Among them, 10 are thought to be from the Goryeo Dynasty, which preceded Joseon, two from 13th-14th century China and one from the Unified Silla (668-918).

But this marked the first time that a Joseon-era ship was identified in the country's history of maritime archeology and excavation. (Yonhap)