''So'' (, originally ) was a type of dairy product made in Japan between the seventh and 10th centuries. According to ''

Engishiki The is a Japanese book about laws and customs. The major part of the writing was completed in 927. Nussbaum, Louis-Frédéric. (2005)"''Engi-shiki''"in ''Japan Encyclopedia'', p. 178. History In 905, Emperor Daigo ordered the compilation of th ...

'', ''so'' was introduced from

Baekje Baekje or Paekche (, ) was a Korean kingdom located in southwestern Korea from 18 BC to 660 AD. It was one of the Three Kingdoms of Korea, together with Goguryeo and Silla. Baekje was founded by Onjo, the third son of Goguryeo's founder Jum ...

, and acted as a gift in kind to the emperors.

Daigo Daigo may refer to: Buddhism *Daigo (Zen) (大悟), a Buddhist term meaning ''great enlightenment'' or ''great realization'' *Daigo (Shōbōgenzō) (大悟), or ''Great Realization'', a book in Eihei Dōgen's Shōbōgenzō *Daigo Temple (醍醐寺 ...

was produced by further processing of ''so''. The first record of so was made during the era of

Emperor Mommu An emperor (from la, imperator, via fro, empereor) is a monarch, and usually the sovereign ruler of an empire or another type of imperial realm. Empress, the female equivalent, may indicate an emperor's wife ( empress consort), mother ( ...

(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. The production sites known to date include Ajifu in

Settsu is a city located in Osaka Prefecture, Japan. As of 2017, the city has an estimated population of 85,290 and a population density of 5,664 people per km². The total area is 14.88 km². Surrounding municipalities *Osaka Prefecture **Higa ...

(current Higashiyodogawa-ku in

Osaka is a designated city in the Kansai region of Honshu in Japan. It is the capital of and most populous city in Osaka Prefecture, and the third most populous city in Japan, following Special wards of Tokyo and Yokohama. With a population of ...

). ''So'' is made by solidifying layers of

milk skin Milk skin or lactoderm refers to a sticky film of protein that forms on top of dairy milk and foods containing dairy milk (such as hot chocolate and some soups). Milk film can be produced both through conventional boiling and by microwaving the ...

. The flavor is light, similar to that of

cottage cheese Cottage cheese is a curdled milk product with a mild flavor and a creamy, non-homogeneous, soupy texture. It is made from skimmed milk by draining the cheese, as opposed to pressing it to make cheese curd—retaining some of the whey and keep ...

References

Japanese cuisine Dairy products {{japan-cuisine-stub