The purpose of the present study is to investigate the use of conjunctions in Early Middle Japanese. By using the Corpus of Historical Japanese and statistical methods, this study examined variations of the frequencies of connectives across periods, genres, and authors. The results show (a) the similarity of Kokin Wakashu Kanajo and Tosa Nikki due to the style of Ki no Tsurayuki, (b) the similarity of song stories due to the high frequency of sate, (c) the influence of periods upon the use of kakari- and sate-conjunctions.