This is a black koji brewed genshu made in that year without adding a single drop of water. It has a savory aroma reminiscent of baked sweet potatoes, along with a rich, thick sweetness and deliciousness. It is a black koji imo shochu genshu that condenses the deliciousness reminiscent of "black koji prepared Sakurajima" and the roots of the traditional black koji imo shochu of Minami Satsuma.
The sweet potato used as the raw ingredients for "black koji genshu" is cultivated in "contract farms in Kagoshima Prefecture." Among the high-quality sweet potato producing areas in Minami Satsuma, the raw ingredients is the "koganesengan" harvested from even more limited fields, and it is a genshu of honkaku imo shochu brewed with black koji.
Among those genshu, particularly excellent ones are aged for one year. Then, every autumn, a limited number of bottles with vintage labels are released as rare and exceptional products.