Dekopon, also known as Shiranui mandarin, is a hybrid variety of citrus fruit developed in Japan by crossing the Kiyomi mandarin and Nakano No. 3 ponkan. It is characterized by its distinctive, rough peel, ease of peeling, tender flesh, and juicy, sweet taste. Rich in vitamin C, it is a popular and delicious citrus fruit in the spring, often referred to as the "ugly mandarin" or "ugly fruit." Its unique flavor and nutritional value have made it widely popular.