Sadly, it's Japan-only for now. The "cartoon edition" is geared toward manga readers, thus the need for more storage. Most Kindles, like the, come packed with up to 4GB of storage, enough to hold thousands of e-books.
Amazon claims this special Paperwhite can hold over 700 volumes of manga, and can turn pages 33 percent faster than the standard model. It's priced at ¥16,280, which converts to around $160, AU$200 and £130.