 The themes "yuri" deals with have their roots in the Japanese lesbian fiction of the early twentieth century, with pieces such as "Yaneura no Nishojo" by Nobuko Yoshiya.Nevertheless, it is not until the 1970s that lesbian-themed works began to appear in manga, by the hand of artists such as Ryoko Yamagishi and Riyoko Ikeda.The 1990s brought new trends in manga and anime, as well as in "dōjinshi" productions, along with more acceptance for this kind of content.