It might be called Enzyme: https://www.amazon.com/assi-Enzyme-Nuruk-1-Pound/dp/B00VXJDTLO

I can get the pictured nuruk from my local Korean grocery store, but I buy this from Amazon, because I think it's better: Andong Nuruk ...and also because of the picture of the sexy ajumma on the package.

I used assi brand from Amazon.

In LA, I tried to look for it at Hmart, galleria, and Califonia market without luck :( Same with hankook market in the bay area

It's super easy to make, I used this recipe.

The hardest ingredient is probably Nuruk, I used this assi brand from Amazon.

It's super forgiving -- I used regular rice instead of glutinous/chabssal and cooked it in the rice cooker instead of steaming it