GearHow it warmsBest forDownside
Hot-water bath (tokkuri in a small pot)Slow and even; aromas open upTrying warm sake; unhurried weekendsTakes two to three minutes; temperature is guesswork
Microwave (tokkuri as is)Fastest, about a minuteA quick weeknight cupHeats unevenly and overshoots easily
Tin chirori (for the water bath)Fast, even conduction; softens the tasteNightly warm-sake drinkersExpensive, and soft tin dents easily
Electric sake warmerHolds a set temperature, warm (104°F/40°C) to hot (122°F/50°C)Temperature perfectionistsTakes counter space and costs the most