Nozawana
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A nozawana (野沢菜) is a Japanese leaf vegetable, often pickled. It is of the same species as the common turnip. Its leaves are approximately 60–90cm long.
Sometime between 1751 and 1764 it was taken by a person who lived in Nozawa from the Kyoto mountains to the Nozawa onsen village. It was cultivated around that area, and thus named Nozawana: na means vegetable in Japanese.
Pickled nozawana is one of the most typical souvenirs in Nagano Prefecture.