Kazusa Province

was an old province of Japan in the area of Chiba Prefecture on the island of Honshū. It was also known as or . 
The ancient capital city of the province was in or near Ichihara, Chiba.
History.
Kazusa was originally part of a larger territory known as , which was divided into Kazusa Province and Shimōsa Province during the reign of Emperor Kōtoku (645-654). Part of Kazusa was made into Awa Province during the reign of Empress Genshō. 
In the Meiji period, the provinces of Japan were converted into prefectures. The maps of Japan and Kazusa Province were reformed in the 1870s.
Shrines and Temples.
"Tamasaki jinja" was the chief Shinto shrine ("ichinomiya") of Kazusa.