PROBLEM TO BE SOLVED: To provide a fermented soybean, such as natto, containing lactobacillus belonging to the genus Enterococcus or bifidus bacteria, having a good effect for health which is expected to have health effects.SOLUTION: This natto or fermented soybean having an extremely large number of the bacteria, a good flavor and an good eat feeling is produced by co-culturing natto bacteria with the lactobacillus belonging to the genus Enterococcus or bifidus bacteria.COPYRIGHT: (C)2008,JPO&INPIT【課題】健康に効果のあるエンテロコッカス属乳酸菌やビフィズス菌を含む納豆などの発酵大豆があれば健康効果をより期待することができる。【解決手段】 納豆菌とエンテロコッカス属乳酸菌やビフィズス菌とを共存させて培養することにより、極めて高い菌数レベルをもち 風味、食感とも良好な納豆あるいは発酵大豆を製造することができる。
