Found this page while reading an article (http://www.jbrowse.com/text/unij.html) (english) about the various Japanese character encodings (JIS-X, shift-JIS, Unicode, etc) and the general dificulty of representing Han characters on a computer. It's a list of new characters (called emoji) NTT/docomo has added for text messaging on their phones. http://www.nttdocomo.co.jp/p_s/imode/tag/emoji/list.html (page in japanese, emoji language-neutral)
Given how much text messaging is used over there, I wonder if these emoji will become a normal part of the language in a few decades...