魔法のかまどご飯 (product's name)
I had planned buying a mobile cooker (カセットコンロ), but changed my mind. Keeping a gas can in my room is scary, actually. I was hesitating to buy it. And because, I found fantastic one.
The Japanese rice cooker company, Tiger provides '魔法のかまどご飯' online. It does not need gas, oil or electricity. It is only needed a newspaper (paper) and fire. It can cook for 3-4 people's rice at once! You can also cook soup etc..! Good on off grit.
I am going to buy this and lots of matches!!! Keep books as fuel.
I would enjoy surviving!!