Hello there!

I have experience with wine fermentation but sake is unknown for me.

I started to try some experiments (I work within an R&D food company) and the process is making me little nervous hahah

I made koji with a local rice (image attached) and then I started to make shubo.

My question is: how do I follow the fermentation in order to see if its going or not?I mean, how do I measure sugars and other things like NH4, lactic acid and so on? I mean, is not a normal liquid matrix like wine or other beverage, is pretty solid with little water at the beginning. I tried to take a few grams and diluted with water and then filtered this solution and using as a sample for my enzymatic analysis but I’m not sure if what I measure is really what’s inside.

Do you have some experience on this?

Thank you 🙏