After a bit about dragonflies, the bulk of this essay is on the reptilian bidiversity of the Japanese archipelago, and compared to New Zealand and the UK. With a paragraph or two on some introduced exotics.
http://www.japantimes.co.jp/cgi-bin/getarticle.pl5?fe20050217mb.htm
Hix
http://www.japantimes.co.jp/cgi-bin/getarticle.pl5?fe20050217mb.htm
Hix