mochi preserved in water
Refers to mochi (rice cakes) soaked in water to prevent mold growth, a traditional preservation method.
My grandmother used to make and store mochi in water during the winter.
Mochi is kept soaked in water to prevent mold.
Compound of 水 (mizu, 'water') and 餅 (mochi, 'rice cake'), literally 'water mochi'. The exact historical origin is uncertain, but the term describes the practice of storing mochi in water to prevent spoilage.