Sake Lees (kasuzuke)
Kasuzuke are imperishable pickles preserved in a mixture of sake lees (the yeast mash that is left over after filtering sake), salt, sugar and sweet cooking wine (mirin). They are allowed to cure for anywhere from several days to several years, and the resulting pickles may be slightly alcoholic with flavors that vary from sweet and mild to strong and pungent depending on how long they were cured for.