生 means raw or fresh in Japanese so Namasake (生酒) means raw or unpasteurized sakes that do not go through the pasteurization process like most sakes. Usually, sakes are pasteurized twice in the brewing process - once after filtering and another after diluting to kill off any bad bacteria, resulting in a more subtle flavour.
Without pasteurization, Namazakes taste fresher with bolder and fruitier aroma, and may also have slight carbonation. However, Namasake can change its flavour and aroma quite easily and quickly so it has to be refrigerated to maintain its freshness and taste. The best solution would be to kanpai and finish the bottle quickly!
Check out the Haneya Junmai Ginjo Kirabi Nama Genshu at our shop now!