The Philippines is the only major producer of calamansi. It is primarily grown for its juice extracts which are exported to the United States, Japan, South Korea, Canada, and Hong Kong, among others. The Philippines exports between 160,000 and 190,000 metric tons of calamansi juice each year. Major production centers include the Southwestern Tagalog Region, Central Luzon, and the Zamboanga Peninsula. Its cultivation has spread from the Philippines throughout Southeast Asia, India, Hawaii, the West Indies, and Central and North America, though only on a small scale.