Earlier quoted context omitted.
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Nice theory, but my experience is exactly the other way around. Even after several years of learning Chinese I still had trouble communicating with Chinese people, especially those who had no experience talking to foreigners. When I arrived in China and asked the way to the university I was going to (which was close by and very famous) they just didn't get what I was saying. In the end I had to show them the written…
On the other hand, the Japanese pronunciation is one of the easiest in the world to learn, even taking into account the subtleties of pitch.