"Mana" (Brassica campestris) belongs to Brassiaceae (the Mustard family). It is an annual herb that is native to China, and introduced into Japan in the Edo period (about 250 years ago). It is a variety of Wild turnip. "Takaya-mana" is a round-leaved strain and cultivated in Toyono-city of Osaka prefecture. "Yamato-mana" is a notched-leaved strain and cultivated in north-western Nara prefecture. This vegetable has not grassy-smelling, and has a sweet and distinctive flavor after exposed by frost. The leaves are used for pickle, boiled green, steamed food and stir-fry.