For the love of god dont put it in the microwave. Heating Up Sake With A Slow Cooker. Pin On Behind The Sip Leave the tokkuri in the hot water bath until the temperature of the sake increases to about 104 F 40 C. . Decanter your sake from its bottle into a ceramic flask Pop it in saucepan and fill the pan with cold water until it reaches 80 of the flasks height. Sake is placed at room temperature is called Jouon but it is sometimes called Hiya so confirmation is requiredIn wine the room temperature is around 18 C but in Japan where the temperature is higher it. It is important to note that it is a potent alcohol and you need to be sure you can consume and hold your drink. So its time to celebrate because warm sake season is here. And the warming process is necessary to take the sharp edge off and give the sake a mellow flavor. Fill the tokkuri with sake leaving approximately 1 inch of space from the top. A