If you want to point out majority opinion, state it as people so. Your opening paragraph was blatantly written to sound as if Japanese people think this way as a unit, even if you didn't intend this to be the case. Personally I don't really care whether you meant it or not.

On the 5 seasons issue - it was just a throwaway comment, not some kind of big debating point. It's more of a lighthearted view in Japan that there are 5 seasons - an old joke if you like, but not perhaps one that you may have heard. Of course people know that there are only 4.

Tiger