台たい湾わん山やま芋いも

noun

water yam; winged yam; purple yam

Refers to Dioscorea alata, a species of yam. The term is rare; the more common Japanese name is 大薯 (ダイジョ).

See also: 大薯

• 台たい湾わん山やま芋いもは東とう南なんアジア原げん産さんのヤムイモの一