The Road to Good Sake
Proof
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The Mystery of the TCA Compound in Sake
Professor Iwata came to Yamunaka under the guise of a family vacation. When he arrived at the brewery, he took samples of the wood from the table they made koji on. He found a lot of this compound called TCA, Tri-Kloro Anisol. To protect itself, the good mold converts that compound into TCA. Once it's in the Murumi, the mash, TCA makes sake taste moldy and only takes a tiny, tiny, tiny bit,. parts per trillion.
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