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So (dairy product)

So (蘇, originally 酥) was a type of dairy product made in Japan between the seventh and 10th centuries.[1] According to Engishiki, so was introduced from Baekje, and acted as a gift in kind to the emperors.[1] Daigo was produced by further processing of so. The first record of so was made during the era of Emperor Mommu (697–707 AD). Tennyakuryo, then a part of the Ministry of Imperial Household, was responsible for the production of so. It was used as a medicine and as an offering to gods.

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