Please pay attention to countries who don't like Skype.

http://ja.wikipedia.org/wiki/Skype

http://www.atmarkit.co.jp/news/200902/06/phone.html

http://www.jpost.com/servlet/Satellite?cid=1233304714040&pagename=JPost%2FJPArticle%2FShowFull

http://japan.cnet.com/mobile/story/0,3800078151,20387894,00.htm