noun
electric rice warmer
A kitchen appliance that keeps cooked rice warm, often part of a rice cooker or a standalone unit.
炊飯器の電子ジャー機能でご飯を保温する。
I keep the rice warm using the electric warmer function of the rice cooker.
電子ジャーに入れておけば、夕方までご飯が温かい。
If you put it in the electric warmer, the rice stays warm until evening.