This thesis examines the origins of seasons that are expressed in『Kojiki(古事記)』and『Manyosyu(萬葉集)』,『Hudoki(風土記)』. The first usage of seasonal expressions can be found in the introduction of thefirst volume in『Kojiki』where autumn (秋) was expressed as ‘Akitsusima(秋津嶋)’. Autumn was most frequently used and expressed through the names of gods anddistricts and this usage represents the very importance of autumn as the season ofharvest in an agricultural society. In the second volume of『Kojiki』‘Haru·Aki(春·秋) Brothers’, a tale of two brothers fighting for a woman’s hand in marriage wherethe younger ‘Haru(春)’ eventually wins, uses seasonal expressions in the names of thebrothers ‘Haruyama(春山) meaning spring mist(霞)’ and ‘Akiyama(秋山) as autumnalleaves(したひ)’ and the competition between the brother initiates the superioritytheory of spring and autumn. Volumes eight and ten in the『Manyosyu』is a compilation of ‘Joka(雜歌)’,‘Somon(相聞)’ on the respective seasons of spring, summer, autumn and winter. In‘Joka’, volume one of the『Manyosyu』, the title song written by composer‘Yuryaku-tenno(雄略天皇)’is a proposal song to a maiden working in a vegetablepatch and the 16thsong in the volume by ‘Nukatanookimi(額田王)’ is a song thatcritiques the vie between the ‘Haru·Aki’(春秋). This thesis examines in detail themeaning and interpretation behind this song. The people of ancient Japan enjoyed the plum blossoms in Spring, the sound ofthe Lesser Cuckoo in Summer and were particularly fond of the Autumn season withits shrub lespedeza flower blossoms, deer and autumnal leaves. This thesis concludes that the origin of the expressions of seasons in Japaneseliterature which began with influences from classical Chinese literature diversifiedand developed its distinct characteristics of using seasonal expressions and thesuperiority theory of spring and autumn in early ancient literature.