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Yamaimo Root Tubers: A Remarkable Variety, Safe to Eat Raw

Yamaimo, colloquially known as mountain yam, is a diverse tuber cultivated extensively across Japan. It plays a significant role in various summer dishes and is a key ingredient in many recipes nationwide. Delve into the world of this underappreciated table staple.

Unique Root Vegetable Yamaimo Offers Raw Delight
Unique Root Vegetable Yamaimo Offers Raw Delight

Yamaimo Root Tubers: A Remarkable Variety, Safe to Eat Raw

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Japanese yamaimo, also known as yamcon or Japanese yam, is a staple in Japanese cuisine. This root vegetable comes in various regional varieties, each with its unique characteristics. In this article, we will delve into three types: Ichōimo, Nagaimo, and Jinenjo.

The Ichōimo, resembling the leaf of the ichō tree or a glove, is most commonly cultivated in the Tōkai and Kantō regions. In contrast, the Nagaimo, a long, cylindrical type of yamaimo, is commonly available in supermarkets and stores, and is mainly found in Hokkaido and Tohoku.

Another type, the Yamatoimo, is round and shaped like a fist, and is cultivated mainly in the Kansai region. It is also known as Tsukuneimo in the Kantō region.

The Nagaimo has a high water content and is only mildly sticky with a light flavor. When grated, it becomes so silky smooth, it is almost like a drink. On the other hand, the Ichōimo is stickier than Nagaimo when grated, making a substantial tororo. In contrast, the Yamatoimo becomes highly sticky and takes on an almost solid consistency when grated.

Jinenjo, a native Japanese variety, is not as commonly found in supermarkets or stores. It is long and thin like Nagaimo, but becomes gnarled and twisted as it grows. Jinenjo is favored as a traditional medicine for providing nourishment and boosting energy.

When making tororo at home, using a mortar and pestle creates a more silky, refined texture. The Nagaimo can be chopped up and added to salads or vinegared dishes to provide an extra crunch. However, Jinenjo is not typically chopped up and added to salads or vinegared dishes.

It's worth noting that Jinenjo is not a type of yamaimo called Ichōimo, Yamatoimo, or any other previously mentioned types. Also, Jinenjo is not grated to become a drink like Nagaimo.

Regional brands of Yamatoimo include Kaga Maruimo from Ishikawa Prefecture, Iseimo from Mie and Nara Prefectures, and Tanbayama-no-Imo from Hyōgo Prefecture.

Lastly, Jinenjo is not used in the dough for jōyo manjū sweet steamed buns.

In conclusion, each type of yamaimo offers unique textures and flavors, adding versatility to Japanese cuisine. Whether you're looking for a smooth drink-like consistency or a substantial tororo, there's a yamaimo for every dish.

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