I found a very interesting and informative blog called iPhoning Japan. I like this site for a variety of reasons.

1. The blog provides a service for those that purchased or are thinking of purchasing an iPhone in Japan. 
2. You can follow updates via Twitter.
3.  If you love taking photos with your iPhone, you can join and share your 2mp iPhone creations via the iPhone Japan Flickr Group.

Here is a blurb from the blog owner:

Phoning Japan is a site set up by  Joseph Tame in order to learn all about the wonder that is Wordpress 2.7. Joseph, a Tokyo resident, is also an iPhone addict, and hopes that by having this outlet readers of his  regular blog will not be driven iPhone mad.