First of all, I was surprised that there was no brand name. The aroma is subdued and the taste is like Shaoxing wine with a brown sugar-like sweetness that lingers on.
Beautiful sweet umami and maybe bitter grapes from the moment of drinking. It has a dry sharpness at the end with moderate acidity while slowly giving a sense of umami. Delicious.
The sweetness of Niigata-like rice, the roundness of the water, and the slightly alcoholic feel are the usual Hachikaiyama, but then the lactic acidity and dry umami gradually become more pronounced, yet still crisp and delicious.