The Ichinomiya Sengen Jinja (一宮浅間神社) is a Shintō shrine in the Takata neighborhood of the town of Ichikawamisato, Nishiyatsushiro District in Yamanashi Prefecture, Japan. It is one of two shrines which vie for the title of ichinomiya of the former Kai Province. The main festival of the shrine is held annually on November 3. It is also known as simply the Ichikawa Ichinomiya (市川一の宮) or the Ichinomiya Myōjin (一ノ宮明神) or the Ichinomiya Asama Jinja.

Ichinomiya is a Japanese historical term referring to the Shinto shrines with the highest rank in a province. Shrines of lower rank were designated ninomiya , sannomiya , shinomiya , and so forth.