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I prepared miso paste in March 22nd 2018, 2 month ago. Now the paste smells miso and the color become darker. The enzyme in Koji, rice malts activate in a plastic bag for fermentation.
The maillard reaction in Koji malt made the color darker, and the enzyme break down the protein in soy beans that made the soybeans very soft.
It seems like already miso paste, but I need to wait until May in 2019. I'll keep post how the miso paste will progress.