emergency backpack; go-bag; disaster-preparedness bag
A backpack packed with emergency supplies, kept ready for quick evacuation during a disaster.
地震に備えて、防災リュックを玄関に置いている。
I keep an emergency backpack by the entrance in case of an earthquake.
Compound of 防災 (disaster prevention) and リュック (backpack, from German 'Rucksack').