Probably not a lot of time left in this campaign, but as of posting you can pretty much every volume (at least the first 8) on Kindle for free from Amazon JP, for those who know how to get Kindle stuff from there.
@GoggledAnon breaking drm with calibre and then bringing it to your kindle is the only method i've found to actually get stuff i bought legitimately onto my kindle from .co.jp
breaking drm with calibre and then bringing it to your kindle is the only method i've found to actually get stuff i bought legitimately onto my kindle from .co.jp