junmai sake; pure rice sake
A category of sake made with only rice, water, yeast, and koji; no added alcohol or sugar. Often contrasted with 本醸造酒 and other sake types.
This junmai sake has a rich, full rice flavor.
Since junmai sake is made only from rice and rice koji, it's recommended for people concerned about additives.
吟醸酒 is a premium sake made with highly polished rice; it can be either 純米吟醸酒 (no added alcohol) or 吟醸酒 (with added alcohol).
From 純 (pure) + 米 (rice) + 酒 (sake), referring to sake made purely from rice without added alcohol.