I am well aware that Japan imports food.

The point is not about whether a country imports at all, but whether it can mobilize domestic production of essential food crops in times of crisis.

Even China import and has rice reserves. There is a reason these government have and subsidized rice reserves rather tea reserves.

I think Japan is well aware it couldn't feed the whole island chain even if it absolutely needed to, but it also has a robust domestic manufacturing and high tech industrial exporting sector which continually acquires funds for foreign currency and food. Totally unlike Sri Lanka.

To put it crudely Japan doesn't need to grow all its own food because people send it money for Toyotas and Mitsubishi cargo trucks and such, and it uses that to buy whatever food it wants.

> whether it can mobilize domestic production of essential food crops in times of crisis.

Sri Lanka could, but not with the chemical fertiliser ban.