The Japanese Constitution
All these are online, English-language versions of the Constitution:
http://www.oefre.unibe.ch/law/icl/ja00000_.html
http://list.room.ne.jp/~lawtext/1946C-English.html
http://www.tabunka.org/special/coj.html
http://www.kantei.go.jp/foreign/constitution_and_government_of_japan/constitution_e.html
http://www.shugiin.go.jp/itdb_english.nsf/html/kenpou/english/constitution.htm
http://www.ilrg.com/nations/jp/const-jp.html
Some opinion poll data on perceptions of the constitution and its role:
http://www.kanzaki.com/jpoll/1997/constitution-1997.html