Jishiyu is a monotypic genus of spiders in the family Agelenidae containing the single species, Jishiyu songjiang.
The genus is named after the nickname Jishiyu (, "timely rain") for Song Jiang (), one of the 108 outlaws in the classical Chinese literature "Outlaws of the Marsh" (). The species is named after the same outlaw.
Jishiyu songjiang has been recorded from Yunnan Province in China.
These are medium-sized spiders, with a body length of around 7 mm.
The genus is related to Orumcekia <small>Koçak & Kemal, 2008</small>.