Any brand of yogurt machine can make natto, but the success rate is very low, and the natto fermentation is not as good as in a real natto machine. The so-called 3-in-1, multi-function, (make natto, yogurt, rice wine) machines on the market are actually yogurt machines, just called different. Strictly speaking: natto fermentation temperature at 40 ° C, yogurt fermentation temperature at 43 ° C, rice wine fermentation temperature at 35 ° C, their temperature difference of these few degrees with a machine is not a solution.

So it is best to do what you buy what machine, do the other can only be just, the success rate is low.