How might an earthquake in Japan affect the
economies of other parts of the world?

Look at explination

Explanation:

Likely because Japan Japan is a large importer and exporter. If ships are not able to come in and out of the harbors due to an earthquake, it would affect other importers.

I'm not 100% sure, but this is what I'd guess.

answer at the divergent plate boundary in the middle of the ocean;