Sake and its delicate flavors are vulnerable to alteration by exposure to both light and high temperatures. It’s best drunk as young as possible. The clear and blue bottles in which it’s usually packaged offer little protection, so sake should be kept in the cool and dark of the refrigerator, and once opened should be consumed quickly.
From the book On Food and Cooking (2nd edition) by Harold McGee. © 2004 Harold McGee.
By permission of Scribner, a division of Simon & Schuster, Inc.