The Kojiki contains the myths of Japan's formation as a polity. It draws on both stories of heavenly deities as well as conquering heroes. Below are some websites that have either excerpts from or the whole text of the Kokiji.

Preface: kojikipreface.html

http://www.wsu.edu:8080/~wldciv/world_civ_reader/world_civ_reader_1/kojiki.html

http://orias.berkeley.edu/japanlinks.html#Kojiki

http://j-myth.info/english/kojiki01.html

http://www.genji54.com/japanese%20classical%20lit/kojiki.htm

http://www.ninpo.org/historicalrecords/kojiki.htm

http://www.sacred-texts.com/shi/

Glossary: http://www.kokugakuin.ac.jp/ijcc/wp/glossary/index.html