Kaga Province (加賀国, Kaga no kuni?) was an old province in the area of Ishikawa Prefecture on the island of Honshū. It was sometimes called Kashū (加州?).
In the Meiji period, the provinces of Japan were converted into prefectures. The maps of Japan and Kaga Province were reformed in the 1870s.
Shirayamahime jinja was the chief Shinto shrine (ichinomiya) of Kaga. 
Media related to Kaga Province at Wikimedia Commons