What is the economic activity of Japan?

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Ask the Hawaiian Islands.

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I'm not sure that I have ever heard it put that way,but it depends on how old your daughter is...I'm assuming that she is fairly young and so I am going to go with things that Japan has a competitive advantage with

They are really good at seafood, high end steaks and rice wine, but they also do cars, information technology, business and tourism

maybe you should direct that to the Japanese ppl thats a hard 1