October 1888 Local private school, "Kamihabu School" is established.
June 1893 Chosei private school opens.
April 1901 Kamihabu School and Chosei Private School are merged into "Taiseikan," founded by Chiba Temmu, medical doctor and educator in Chiba Prefecture.
April 1911 Taiseikan becomes "Taiseikan Junior High School."
September 1923 Taiseikan officially becomes a prefectural junior highschool in Chiba, this time called, "Chosei."
April 1948 Chiba Prefectural High School is established as it known today and has been providing high-quality education in Mobara for over 60 years.