Refers to Dioscorea alata, a true yam with purple flesh. Also called ダイジョ. Not a sweet potato.
See also: ダイジョ
In Okinawa, sweets made with purple yam are popular.
purple-fleshed sweet potato
Any of several varieties of sweet potato (サツマイモ) with purple flesh. Often contrasted with 紫芋, which may refer to a specific variety.
See also: 紫芋
Conus pauperculus (cone shell)
A species of cone shell. Usually written in kana as ベニイモ. Related to イモガイ (cone shell).
See also: イモガイ
This purple sweet potato becomes sweeter when roasted.
The Conus pauperculus is a type of cone shell and can be found in the seas around Okinawa.
Standard kanji spelling for the purple yam and purple sweet potato senses.
Alternate spelling with kana いも; less common but seen in product names and casual writing.
Katakana spelling used for the cone shell sense usually-kana marker.
Literally 'crimson potato'. The name comes from the reddish-purple color of the flesh. The use for the cone shell is likely from its resemblance to the tuber.