Over the past few years, there has been a small surge in the popularity of muroka nama genshu sake. While it is hardly shaking the industry to its foundations, quite a few brewers -- usually smaller kura -- have begun to market this kind of sake.
In short, muroka nama genshu is sake that is unfiltered (muroka), unpasteurized (nama) and undiluted (genshu). In other words, this is the drink in its most natural form, just as it is immediately after it's been pressed.
Let us look at these three qualities in a bit more detail.