Earlier quoted context omitted.
> Life on an island with a historically strict protectionist food policy. There is no potato shortage, per se (per the article, I'm surely no expert). There's a shortage of potatoes from Hokkaido, and domestic consumers aren't prepared for (or allowed to) buy them from an international market. Yeah, if only they gave up their autonomy and local agriculture to have more access to chips from abroad.
Surely there is a middle ground between "stupid chip shortage" and "loss of local agriculture" though. Japan can grow potatoes and trade them too. Like I said, everyone does this to some extent. But Japan is among the worst
It would allow imports to prevent shortages in the market without killing the local producers because there is no reason to stop buying from local producers if the imported goods cannot be sold at a price lower than what the local producers are willing to bear. Distributors would continue buying local, while also adding some imports as a cushion against production fluctuations.
Tax the difference between the local market price and the lower imported good price, when the imports are cheaper. Don't tax when the import is at the same cost/more expensive.