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Kuganmu, or Kugaimo in the Okinawan dialect, is a wild yam belonging to the Dioscoreaceae family, genus Dioscorea, and is a type of yam. It is also known as Tokedokoro or Hariimo.

Kuga means egg in the Okinawan dialect, but it can also refer to male testicles. The origin of the name Kugaimo is uncertain, but it is thought to be due to its egg-like shape or its similar appearance.

The other name, Tokedokoro, is said to come from its thorny vines. Because the vines are covered with thorns and fine roots, it is difficult to care for and remove the soil after digging, which is why there are few farmers who produce it in Okinawa.

Kugaimo, like yam, is native to tropical Asia, and it seems that it has been cultivated in Japan only in Okinawa and Amami since ancient times. When grated, it is very sticky and can be cooked in the same way as yam. 　-- Gemini--