This sake has long been a very popular item in Japan. Enjoy for its delicious taste, convenient size and accompanying cup. Serve chilled, room temperature or warmed.
I think perhaps it is the ritual of warming sake that makes it taste and feel so good. (Put it in a pot of water and heat it until you see the FIRST bubble in the heating water; much prior to boiling. Then remove the sake grenade from the hot water. That should be right around 110 degrees.) Gekkiekan can be bought for $6.99/750ml in New Mexico, BUT that size is brewed and bottled in California. There is a noticeable difference. The Kyoto grenades taste like they came off an assembly line that has been doing this better and longer.
I just cannot imagine drinking sake chilled. But I guess some people prefer cold cheeseburgers.