[Geco]

I think you can check on other sites, together with Kobo. For example Aozora (should be free: http://www.aozora.gr.jp/ )

From Italy (same here, Japanese wife), I can see these: http://www.kobobooks.com/search/sear...s=&g=both&l=ja

And you can visit
http://dl.rakuten.co.jp/book/
http://pdabook.jp/pdabook/
http://direct.ips.co.jp/book/impressjapan.cfm
http://www.shosai.ne.jp/
http://www.netoff.co.jp/index.jsp book off を知ってますか？ eh eh eh
http://ebook.digitalink.ne.jp/
http://www.papy.co.jp/
http://books.bitway.ne.jp/meng/cp.php?req=top&site=book