Do the Japanese really love nature more than all other people ?

[Maciamo]

Thank you for pointing out that you have no idea for yourself.

No need to attack me personally.

As I stated, you personally do not know and are merely quoting someone else that as far as you know is not entirely correct. I believe that if you were to check his references it would indicate that he is talking about where rivers pass through major metropolitan areas.
If a river were indeed bordered completely by concrete, then it would be man made, and not truly a river then would it?

If you want to prove Kerr wrong, why don't you give me examples of rivers in Japan that have not been "concreted" ?