Background: Daidzin (glycosidic isoflavone) bioconversion into daidzein (aglyconic increases its bioactivity. This can be carried out using fermentation, a fungus that has been widely used for making tempeh in Indonesia, Aspergillus oryzae. Objective: study aimed to validate the method of analysis and determine content A. oryzae-fermented edamame TLC densitometry. Method: Daidzein determination...