Need to prepare: soybean, rice cooker, natto powder, small bowl, clear water, starter.

1, first prepare a proper amount of soybeans, as shown in the figure.

2. Then put the soybeans into the rice cooker and steam for 50 minutes.

3. Take out the steamed soybeans below.

4. Then pour the natto powder into a bowl, and pour water to dissolve.

5. Next, pour the bacterial liquid into the soybeans and stir well.

6. Then put the soybeans into the fermenter for fermentation.

7. Finally, the Bacillus natto is made, as shown in the figure.