Traditional marketplaces open for a day in every 5 days. It is a fixed periodic urban event for place of the direct exchanging of products by farmers and artisans at a regular time and place.

The 5-day market appeared in the Joseon Dynasty. It was established in the southern region during the end of 15th century called Jangsi (equivalent of current market). The numbers increased through the Imjinwaeran (Japanese invasion of Korea in 1592), and by the end of the 17th century, most markets used the 5-day system. The nationwide market system was unified as a 5-day market held 6 times per month.

The 5-day market is open alternately on different dates in 3 places or 4 to 5 places maximum in Gun regions. Therefore, residents had opportunity shop more than 18 times a month. The 5-day market acted as a permanent market place for the people in the region. The formation of the 5-day market system indicates the creation of market region of regular exchanges within Gun regions.

These 5-day markets continued to maintain their tradition through to the end of the 20th century. However, pushed aside by urbanization and industrialization, they now exist mostly in name only.