winged bean
A tropical legume with four-edged pods; the Japanese name literally means 'square bean'.
Winged beans are commonly eaten in Southeast Asia.
Katakana spelling is common for this plant name; usually written in kana.
Kanji spelling is possible but uncommon; the word is usually written in kana.
From 四角 (shikaku, 'square') + 豆 (mame, 'bean'), referring to the square cross-section of the pods.