purple yam; water yam; winged yam
Refers to the edible tuber Dioscorea alata, often used in Southeast Asian and Okinawan cuisine. The Japanese term 大薯 (ダイジョ) is a synonym.
See also: ダイジョ
パープルヤムは沖縄のスイーツによく使われる。
Purple yam is often used in Okinawan sweets.