Mystery solved

Here is the 'mystery bird' that was in the persimmom tree. Thank you to K-san for telling me its name :)

In English, it is called the 'Azure Winged Magpie', in Japanese 'Onaga'. Here are some pictures I found on the Internet.

Take a look at this page:

http://www.wbsj.org/birdwatching/gallery/2006/01.html

There are some wonderful pictures of other Japanese birds. It seems to be a group that shares bird-watching photos.

The second photo came from here, where you can also read about the bird:

http://www.tbs.co.jp/seibutsu/zukan/bird/htmls/bird_08.html