Keosan Co., Ltd. is Korea's No. 1 sweet potato specialty company that is developing the domestic sweet potato market by producing, processing, distributing and exporting sweet potatoes. The company is an integrated marketing organization of farmer cooperatives in major sweet potato producing regions of the country, of which its contract farms are the largest. The company supplies healthy and flavorful sweet potato seedlings, integrates quality control and marketing of sweet potatoes, and manages farmers' equipment, house facilities for growing sweet potato plants, and soil suitability. The company also evaluates the condition of sweet potatoes at harvest (skin, shape, and presence of pests) and actively participates in the production of disease-free seedlings with excellent seeds and distributes them to its affiliated farmers. The company supplied 10,000 to 50,000 shares of sterile sweet potato seedlings to farmers producing Danjami in 2022 and Ho Pungmi in 2023. The representative brand is "Hatton" and the representative product is “Sweet potato jerky 3 types”, which are handmade nutritious snacks made from 3 varieties of sweet potato.

Hatton's products include raw sweet potato, pumpkin sweet potato, pungwonmi sweet potato, purple sweet potato, yellow sweet potato, and hopungmi sweet potato, and processed products such as honey mungun sweet potato, iced honey flavored sweet potato, iced mugwort sweet potato, iced mini sweet potato, iced sweet potato, carrot honey flavored sweet potato jerky, sticky honey flavored sweet potato jerky, and pumpkin honey flavored sweet potato jerky. They are available in 10kg, 5kg, 3kg, 2kg and 1.5kg cartons and 700g, 800g, 900g, 1kg and 1.5kg bags. There are also frozen sweet potatoes in 500g, 400g, 120g and 80g, and three kinds of sweet potato jerky in 80g, 60g and 45g. In 2020, the company exported USD 11,308 to Australia, Dubai and Hong Kong; USD 67,300 to Australia and Dubai in 2021; and USD 20,355 to Dubai, Hong Kong and Australia in 2022. In Australia, “Ice Gun Sweet Potato” is popular as a snack, and in Dubai, the original “Honey Sweet Potato” is a steady seller, especially in Korean supermarkets.

As of June 2022, 66 farms nationwide shipped KRW 174.39 billion worth of sweet potatoes on 617 hectares. Seju Agricultural Corporation in Yeoju, Gyeonggi Province, shipped KRW 3.78 billion on 126 hectares from 24 farmers, Taean Agricultural Cooperative Corporation in Chungnam Province shipped KRW 1.27 billion on 37 hectares from 13 farmers, and Solbit Agricultural Cooperative Corporation in Naju, Jeolla Province shipped KRW 1.17 billion on 57 hectares from five farmers. Five farmers from Insan, Sweet Potato Sarang that is an agricultural corporative in North Jeolla Province, shipped KRW 1.67 billion on 58 hectares, and 18 contract farmers of the company shipped KRW 9.49 billion on 338 hectares. The company has a sorting capacity of 30 tons per day and 9,000 tons per year, and a storage capacity of 15,600 tons per year, including three 8,560-ton curing and low-temperature aging facilities and four cold storage facilities owned by participating farmers. There is also a research and development laboratory for sweet potato processed foods and quality improvement.
Keosan Co., Ltd. has the best post-harvest quality control of sweet potatoes. The company has an optimal operating system with a thermostat-controlled warehouse to maintain the proper storage temperature and humidity for sweet potatoes. Sweet potatoes are susceptible to spoilage if they have wounds, as these wounds allow bacteria to enter. Treating the wounds on the epidermis under high temperature and humidity conditions and allowing the wounds to heal promotes saccharification, which increases sweetness and extends shelf life. In order to achieve this, disinfection of the warehouse is essential. The curing temperature is 30-33 degrees and humidity is 90-95%. Optimal storage conditions are 12-15 degrees and 85-90% humidity. Maintaining ventilation and breathability is also important, so we use web-based temperature and humidity loggers for real-time monitoring. For pest control and hygiene management, the warehouses are disinfected after storage and mold is removed. SESCO, a company specializing in pest control, helps with this. The company has received ISO9001, HAPPC, MAIN-BIZ, Inno-BIZ and pesticide-free certifications for its efforts. It also has patented technologies such as “Distinctive Texture Sweet Potato Jerky Technology,” and was named “2018 Shipping King” by the National Agricultural Cooperative Federation.