The boiled soybeans are then placed in contact with the straw and the temperature is maintained in the range of 37 to 42°C, whereupon the bacillus subtilis natto germinates from the spores and starts to increase.
その後、ゆでた大豆を藁と接触させ37度から42度に保つと、納豆菌は芽胞から発芽し増殖を始める。