Kamitsumaki describes the period from Tenchikaibyaku (creation of heaven and earth) (Japanese Mythology) to the formation of the Japanese Islands and development of National land, and also describes the mythological age from tenson korin (tensonkorin - the descent to earth of the grandson of the sun goddess) to Yamasachihiko.
天地開闢(日本神話)から日本列島の形成と国土の整備が語られ、天孫が降臨し山幸彦までの神代の話を記す。