包ほう装そう米べい飯はん

Meanings

1

noun

packaged cooked rice

Refers to pre-cooked rice sold in sealed packs, often shelf-stable or frozen, common in convenience stores and supermarkets.

meal, boiled rice

レトルトご飯はん
レトルトご飯 specifically refers to retort-pouch cooked rice, while 包装米飯 is a broader term for any packaged cooked rice.
無む菌きん包ほう装そう米べい飯はん
無菌包装米飯 is aseptically packaged cooked rice, a subset of 包装米飯 with a longer shelf life.

Compound of 包装 (packaging) + 米飯 (cooked rice).