pre-cooked rice; retort-pouch rice
Refers to rice that has been cooked and sealed in a retort pouch, ready to heat and eat. Common in convenience stores and as emergency food.
I bought some retort-pouch rice as emergency food.
You can eat retort-pouch rice just by heating it in the microwave.
Compound of レトルト (retort, from English) and ご飯 (rice). Refers to rice packaged using retort-pouch technology.