A drip irrigation system with plastic mulch film was evaluated in terms of growth, yield, and water productivity (WP) using three leading paddy rice cultivars (Japonica) the Kanto area Japan. cultivation upland field (DI) continuous flooding a (CF) were conducted 2015 2016 (DI CF). The amounts total supply (irrigation precipitation) 715 mm, 599 905 mm 1620 1379 1687 for DI 2015, 2016, CF respec...