@curstpriest : DTP = "Digital Text Platform" = Amazon's web interface for self-publishing ebooks for Kindle (
http://dtp.amazon.com).
@JiYu : You could try using the Kindle Previewer (available for download from
http://www.amazon.com/gp/feature.htm...cId=1000234621) which simulates what a MOBI ebook will look like on a Kindle, and simply take screen shots. That will be a lot of work though.
I'm a bit unclear on what you want to do with the screen shots. If Japanese isn't yet a supported language on DTP, it doesn't matter if the ebook consists of actual text or images of text - it still won't be accepted by Amazon for publication in the Kindle store.