PROBLEM TO BE SOLVED: To provide a method for efficiently producing fermented organic matter such as fermented manure, soy sauce, miso, Japanese sake, beer, and bread.SOLUTION: A method for producing fermented organic matter includes fermenting organic matter to serve as a raw material for the fermented organic matter, in the presence of nanobubble water.SELECTED DRAWING: None【課題】発酵堆肥、醤油、溝、日本酒、ビール、パンなどの発酵有機物を効率的に製造する。【解決手段】発酵有機物の原料となる有機物を、ナノバブル水の存在下に発酵させる、発酵有機物の製造方法。【選択図】なし