Chianan Irrigation (Chinese and Japanese: 嘉南大圳; pinyin: Jianán Dàzùn; rōmaji: Kanan Taishū; "Chianan Great Ditch"), also known as the Kanan Irrigation System, was built to support agricultural production in the Chianan Plain of Taiwan. The name "chia-nan" was derived from two place names among its surrounding area called Chiayi and Tainan. Although it includes some other facilities, such as the Wusanto Reservoir, the term "Chianan Canal", in a narrow sense, would only mean the canals of this system.