Jippensha Ikku(十返舎 一九, 1765 – 1831) was the pen name of Sadakazu Shigeta (Shigeta, Sadakazu), a Japanese writer active during the late Edo period of Japan. He lived primarily in Edo in the service of samurai, but also spent some time in Osaka as a townsman. He was among the most prolific yellow-backed novel(黄表紙kibyōshi) writers of the late Edo period — between 1795 and 1801 he wrote a minimum of twenty novels a year, and thereafter wrote sharebon, kokkeibon and over 360 illustrated stories(合巻gōkan).