Tao-jiew (Thai fermented soybean condiment)

What the name describes

JIRCAS labels the entry Tao-jiew and gives the Thai name เต้าเจี้ยว. It describes a semi-solid, salty soybean condiment ranging from pale to dark brown. Spelling and transliteration vary; this article refers to the product in that database entry rather than treating every fermented bean paste as the same food.

Uses named by the source

The entry shows Tao-jiew is used in Tao-jiew-lon and other dishes, and may be eaten as a side dish with rice. It does not survey regional differences or provide a fuller list of dishes.

Ingredients and fermentation stages

JIRCAS lists soybeans, wheat or rice flour, salt and koji mold. Its process text identifies Aspergillus oryzae grown on cooked rice for an approximately 72-hour koji stage, followed by maturation under salt solution. The same database record's microorganism field says information is unavailable, so its organism field and process description do not agree. The entry shows separating a solid paste from liquid; it says the liquid can be processed further into soy sauce.

A source-specific method account

The JIRCAS account describes washing and soaking whole soybeans for 12 hours, steaming them until soft, and roasting and grinding an amount of wheat or rice flour equal to the soybean amount. It says to mix these on a bamboo tray, add the rice-grown koji, and leave the mixture for about 72 hours. The koji is then covered with “20%” salt solution in a lidded earthenware pot and left in a sunny place for 3–6 months. The basis for the flour-to-soybean quantity is not given, so it is unclear whether the comparison is by raw, soaked or cooked weight. The denominator of the 20% salt solution, the starter amount, environmental conditions and an objective endpoint are not explained. The packed paste is said to be pasteurized, but no time or temperature is given. These missing details mean this is not a complete household formula or process instruction.

What remains unresolved

The 3–6 month period and the statement that the paste can keep for years, with flavour preferred within one year, are claims in this particular database entry. It supplies no storage conditions or validated shelf-life evidence. It also gives no province, historical attestation, season, measured maturation conditions, monitoring plan or failure criteria. The Japanese method and Thai transliteration need specialist review.

Open questions in the sources

The flour amount is described as equal to the soybean amount, but the weight basis is not stated.

The basis of the 20% salt solution, starter quantity, environmental controls, endpoint and pasteurization conditions are not reported.

Historical, regional and seasonal context and specialist review of the Japanese method and Thai terms remain open.

The source's maturation and keeping-time statements have no stated storage conditions or independent validation.