PROBLEM TO BE SOLVED: To solve the problem that the production of acetic acid with microorganisms using a tea-extract including tannin having a concentration higher than that of a tea leachate directly drunk as a favorite drink has been difficult, to provide a high concentration tea fermentation product including acetic acid and also including a tea-derived component highly than the fermentation product of a tea leachate directly drunk as a favorite drink, a method for producing the same, food and drink using the tea fermentation product, and a method for producing the same.SOLUTION: The fact that, by the incorporation of a step where a tea extract is treated with tannase and a step where the tea extract is fermented with microorganisms having acetic acid fermentation capacity in the presence of ethanol, the efficient acidic acid fermentation is made possible owing to the microorganisms having acetic acid fermentation capacity has been found. In this way, the fact that a high concentration tea fermentation product including a tea-derived component at a concentration higher than that in the fermentation product of a tea leachate including acetic acid and also directly drunk as a favorite drink can be produced has been found to perfect this invention.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】 し好飲料として直接飲用する茶浸出液よりも高い濃度のタンニンを含む茶抽出物を用いて、微生物により酢酸を生成させることは困難だった。本発明は、前記に鑑みてなされたものであり、酢酸を含み、かつし好飲料として直接飲用する茶浸出液の発酵物よりも茶由来成分を高濃度に含む高濃度茶発酵物及びその製造方法、並びに該茶発酵物を用いた飲食品及びその製造方法を提供する。【解決手段】 発明者らは、茶抽出物をタンナーゼで処理する工程及び茶抽出物をエタノール存在下で酢酸発酵能を有する微生物により発酵させる工程を含むことで、酢酸発酵能を有する微生物が効率的に酢酸発酵することが可能になることを見出し、それによって、酢酸を含み、かつし好飲料として直接飲用する茶浸出液の発酵物よりも茶由来成分を高濃度に含む高濃度茶発酵物を製造できることを見出し、本発明を完成した。【選択図】なし
