Brassica rapa
or Japanese mustard spinach ("Brassica rapa" var. "perviridis") is a leaf vegetable. It is a variety of "Brassica rapa", the plant species that yields the turnip, mizuna, napa cabbage, and rapini. It is grown commercially in Japan and Taiwan. It is a versatile vegetable that is cooked and eaten in many ways. The plant is also used for fodder in some Asian countries.