This article describes many of the problems that should be addressed to solve the trade dispute:
“The problem is that there is not an obvious way out and things have gone too far for either side to back down,” Dujarric said. “I do not believe this is going to get to the point where the two countries will actually be fighting each other, but this is going to take a very long time to heal.”
Japanese trade data showed beer exports to South Korea plunged to zero last month from 800 million yen ($7.3 million) a year earlier, amid boycotts sparked by an escalating trade spat between the Asian neighbors.
https://edition.cnn.com/2019/11/29/business/south-korea-japan-trade-war-beer-export/index.html
When it has reached the beer stage it is a problem.