You don't. If you live where cars are not needed, e.g. Tokyo, you'll just walk to your nearest small grocer and get the ingredients you need. That's what I did when I stayed in Japan for work.
Thankfully, my little corner store will remain open during floods and other natural disasters as well as pandemics and such. So it will never be necessary for me to have more than 24 hours worth of food in my house.
You don't. If you live where cars are not needed, e.g. Tokyo, you'll just walk to your nearest small grocer and get the ingredients you need. That's what I did when I stayed in Japan for work.
Thankfully, my little corner store will remain open during floods and other natural disasters as well as pandemics and such. So it will never be necessary for me to have more than 24 hours worth of food in my house.