沖繩群島
Citrus depressa ("Citrus" × "depressa", formerly "C. pectinifera", "shiikwaasa", "hirami remon" or "shīkuwāsā"), in English sometimes called shiikuwasha, shequasar, Taiwan tangerine, Okinawa lime, flat lemon, hirami lemon, or thin-skinned flat lemon, is a small, green citrus fruit rich in flavonoids and native to East Asia (Taiwan Island and Okinawa Islands, Japan).