Pingtung's Jiuru Township has proven particularly exceptional—intense sunshine and pristine water flowing from Dawu Mountain (in southern Pingtung County), combined with Taiwan's advanced agricultural techniques, have made Jiuru lemons legendary, earning the area its nickname as the Hometown of Lemons. The township primarily grows seedless, four-season, perfume, golden, and flat varieties (xiangmeng), most destined for juice production.

Compared to lemons from other regions worldwide, Taiwanese lemons possess a distinctively rich yet clean fragrance. Their acidity is often described as tasting like "first love"—tart, sweet-and-sour, and utterly unforgettable.

Flat Lemon—The Emerald of Taiwan’s Southernmost Tip, Found Only in Taiwan and Okinawa

Among Taiwan's many lemon varieties, the native flat lemon (called mountain tangerine in Hakka and sour orange in Hokkien) deserves special mention—this citrus grows nowhere else in the world except Taiwan and Okinawa, Japan.

In Japan, flat lemon has become a wildly popular health food, with its juice fetching NT$1 per cc—a 250cc glass costs NT$250, earning it the moniker "new green gold". In Taiwan, flat lemon remains largely found only at its source in Pingtung or at farmers' markets, though in recent years it's been increasingly marketed as the emerald of Taiwan’s southernmost tip.

Taiwanese flat lemon contains four times the flavonoids of Japanese varieties, making it even more valuable and showing promising potential for development into enzymes, probiotics, and other health products—positioning Taiwan's flat lemon as a rising star in today's biotechnology industry.