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.

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.

The production sites known to date include Ajifu in Settsu (current Higashiyodogawa-ku in Osaka).