Fresh Green Tea Sejak, a traditional Korean tea made from sprouts picked between Gokwoo, which signals the start of the farming season, and Ipha, which marks the beginning of summer, is also called Jakseolcha because the tea leaves resemble a sparrow's tongue. Sejak has a deep fragrance and a savory, bittersweet flavor, and the tea water has a clear green color. According to Donguibogam, Sejak lowers energy, clears the mind, and promotes digestion and diuresis, helping treat diabetes.

Green tea is rich in polyphenols with antioxidant properties and catechins with anti-inflammatory properties, which are beneficial to people.

Fragrant Jeju Black tea, a representative fermented tea, is made by spreading the tea leaves out for a certain period of time to dry them, then going through a 'yu-yeom' process where physical force is applied to the tea leaves to even out the moisture content, and then fermenting and drying them. The quality of black tea is determined by the ratio of theaflavins and thearubigins produced during the fermentation process. If fermentation is insufficient and the ratio of theaflavins is high, the color of the broth becomes closer to a greenish orange, and it has a bitter and stimulating taste. Also, if over-fermentation occurs, the ratio of thearubigin increases, the color of the broth becomes dark brown, the taste becomes bland, and the unique flavor and aroma of black tea disappear. Black tea with proper fermentation has a unique bitter and astringent taste in harmony, giving it a refreshing taste.

Sannoru's black tea is a straight tea made only with tea leaves from Jeju, allowing you to enjoy the original bright color and aroma of Jeju black tea.