This sake is produced in the Tokushima prefecture located on the offshore island of Shikoku. Tokushima has a unique culture distinct from the mainland of Japan. Over 3/4 of Tokushima is covered by forests and the prefecture is also famous for its clear seas and abundant water. Yamahi Old Mountain Sake is cold brewed. Cold brewing is a process that is done in the winter time. Snow is collected in a kettle and the kettle is added to the brew, lowering the temperature and causing the brewing process to be slower and longer. The result is a sake that is darker in color and bit aged Riesling like in flavor. It has a delightful aroma of super dry, yeast mash sourness, which becomes even more pleasant and mildly sweet after it is allowed to breathe.