sojae (Soy Sauce Koji Mold) — Species | WeMush Taxonomy

sojae

Soy Sauce Koji Mold

Aspergillus sojae is a filamentous fungus domesticated from the wild species Aspergillus parasiticus. Unlike its wild ancestor, A. sojae has lost the ability to produce aflatoxins and cyclopiazonic acid, making it safe for food production. It is genetically stable and specialized for the breakdown of proteins (proteolysis), possessing high proteolytic activity and relatively low amylolytic activity compared to A. oryzae. It grows as a mold on substrates, forming a dense mat of mycelium.

Edibility: Edible (Processed/Fermented). This species is classified as Generally Recognized As Safe (GRAS). It is not eaten as a mushroom but is the primary organism used to ferment soybeans and wheat for soy sauce (shoyu) and miso production.

Habitat: Domesticated species found primarily in fermentation environments (koji rooms). In the wild, related strains are found in soil and decaying plant matter.

Difficulty: INTERMEDIATE

Cultivation Suitability

Preferred Substrates

Soybeans

Wheat

Legumes

Distribution

Worldwide in industrial food processing; historically originated in East Asia (Japan, China).

Known Strains (0)

No strains cataloged yet for this species.

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