here are two pages that might help you a bit:
http://www.abuilttolast.com/kanji/peace.html http://japanese.about.com/bl50kanji.htm
Japanese symbols are called kanji, and that's basically japanized chinese characters.. they provide both sound and meaning, unlike the two other japanese scripts.
Anyway, knowing that they are called kanji should help you searhing for more stuff at
www.google.com.. or you could try asking in sci.lang.japanese or something if you cannot find it on the web. I would've loved to help you personally but I do not really know any kanji so.. ^_^ another good advice would be, if you have many different words you want to use, to buy an english-to-kanji dictionary or something.