Bitcoin is becoming the topic in Japan. There are a lot of blog and Web media which comments on Bitcoin, and even TV news reports it. They are few, but Tokyo has the bars which can pay in Bitcoin. Unfortunately the Japanese books about Bitcoin have not been yet published, but it will be a matter of time.
By the way, Japan's Finemotion Co,Ltd. performs the interesting Bitcoin support project. It is the Japanese proud skill "Personification".
She is Bitcoin-chan. When Bitcoin came to Japan, it became like this! :) They support Bitcoin by making free Manga, free illustrations, widget and goods. widget displays the realtime price of Bitcoin on your blog.
(C)Bitcoin-chan Project Bitcoin-chan Widget
You can watch a lot of her images in a project site.