Sake can be served both gently warmed or chilled. It really depends on the type. If you have an elegant Daiginjo, warming may erase any subtle aromas and complexities. However, a hearty junmai may open up with warming.
You should consume sake as quickly as possible after opening. If it is kept sealed and in the refrigerator, it will not spoil and can be consumed for several weeks, however, the flavors will soften considerably.
As would seem obvious, most of the calories in sake come from alcohol. Different sakes have a range of alcohol percentages and residual sugars, so it’s impossible to give a fixed, absolute calorie count for all sakes. Instead, we can work with an approximate average to get us in the right ballpark. So, you can figure sake has about 40 calories per 1 fluid ounce / 30 milliliters. Let’s translate this to some common sizes to give us practical approximate calorie counts:
Small “ochoko” sake cup (1.5oz | 44ml) = 60 Calories
Small “tokkuri” sake carafe (5.0oz | 150ml) = 200 Calories
Now, remember, these calorie counts are approximate based on calorie averages. Most sakes on the market are 15.5% alcohol by volume. If you’re drinking a 6% alcohol sparkling sake, it’s reasonable to assume the calories would be lower, and conversely, if you’re drinking a fortified Honjozo Genshu Nigori at 20% alcohol, calorie counts would likely be higher. In any case, these calorie counts can help us at least get a handle on our sake calorie consumption… hold the Big Mac.