tang cai; Brassica rapa var. toona
A variety of Chinese cabbage; the name is usually written in katakana as トウナ.
Tang cai is a type of Chinese vegetable often used in stir-fries.
Katakana spelling is common for this vegetable name; usually written in kana.
Kanji form is rare; the word is usually written in kana.
From Chinese 唐菜 (táng cài), literally 'Tang vegetable'.