"A traditional Japanese food made from the processed seeds of the Kochia plant"
-Moeko Asano
Kochia is a plant originally from China and has been used there as a medicinal herb for about 3,000 years. It is said to have been introduced to Japan more than a thousand years ago, around the Heian period. During the Edo period, kochia began to be widely cultivated as a broom material. In northern Akita, it was grown extensively and used both as medicine and as a material for everyday items. Although its seeds were eaten as early as the Heian period, they were usually reserved for special occasions. The origin of tonburi is often linked to times of famine in the Edo period, when people processed the seeds out of necessity and began eating them. However, because the processing required considerable effort, it did not spread widely at first. Today, tonburi is commercially produced, mainly in the Hinae area of northern Akita, and is known as one of the prefecture’s representative local specialties.
Photo by Ayotte/ Wikimedia Commons
The most distinctive characteristic of tonburi is its unique texture. Each grain is very small, about 1–2 mm in diameter. It has almost no taste or smell, but it leaves a strong impression because of its popping sensation in the mouth. For this reason, it is sometimes called “field caviar”. Since it does not affect the flavor of other ingredients, it is often mixed with natto or grated yam, or used as a topping for vinegared dishes and salads. In terms of nutrition, tonburi is rich in dietary fiber, which is said to help stimulate intestinal movement. It also contains various minerals and vitamins. Because it includes carbohydrates and protein, its calorie content is slightly higher than that of many vegetables. However, it is known as a food that contains a variety of nutrients in its small grains.
Description of Tonburi, a Specialty Product of Odate City, Akita Prefecture (English subtitles)
Recipes Using Tonburi (English audio)
Tonburi Food Report (English audio)
What interests me most about tonburi is its texture. Even without a strong flavor, it is well known for its unique mouthfeel. I have tried it simply with soy sauce, but I have never eaten it combined with other ingredients. I would like to try it in different dishes in the future. Researching further, I found that tonburi is sometimes used as a vegan alternative to caviar. As the global demand for vegan cuisine continues to grow, plant-based ingredients like tonburi seem to offer new possibilities.
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