Daidai
The daidai (Japanese: 橙, 臭橙; Chinese: 酸橙; Korean: 광귤, gwanggyul) is a variety of bitter orange native to Asian regions.There are two main cultivars, kabusu (カブス) and kaiseitō (回青橙), and the latter bears smaller fruits than the former in Japan.[1] The fruit is very bitter and not usually eaten, but its dried peel is used in Kampo (the Japanese adaptation of Chinese medicine).The dry peels of young fruits are called kijitsu (枳実) and are used as a stomachic, expectorant[2] as well as a laxative.[1] Another background of its name refers to the shape of kaiseito's calyx, which appears to be stepped or as if the fruit is borne on two pedestals or daidai (台々).