1933			Hiromu Okano & Saku Okano established Wasaijyuku at Honden Tateishi (in Katsushika ward, Tokyo)
1939			Honden Girls' Sewing School was established at the same location.
1942			Kyoei Girls' Commercial School, juridical foundation, was established in Ohanajyaya, Katsushika ward, Tokyo,.
1942			Hiromu Okano assumed the chairman of the board and principal of the schools.
1946			The school was reorganized into Kyoei Girls' High School, juridical foundation.
1947			Kyoei Gakuen Junior High School was established in Katsushika ward, Tokyo.
1948			Kyoei Gakuen High School was established in Katsushika ward, Tokyo.
1950			The schools were reorganized into Kyoei Gakuen, private school corporation.
1954			Kyoei Kindergarten was established in Katsushika ward, Tokyo.
1963			Hiromu Okano was commended for contribution to education.
1965			Hiromu Okano, chairman of the board, passed away.
1968			Saku Okano assumed the chairperson of the board and principal of the schools.
1971			Saku Okano was presented with the Order of the Sacred Treasure, Gold and Silver Rays for contribution to education.
1977			Makoto Okano assumed the principal of the schools.
1977			Kasukabe Kyoei High School was established in Kasukabe city, Saitama.
1984			Kyoei Gakuen Junior College was established in Kasukabe city, Saitama.
1984			Saku Okano was decorated with Junior Sixth Rank.
1984			Saku Okano, chairperson of the board, passed away.
1984			Minoru Okano assumed the chairman of the board.
2001			Kyoei Gakuen Junior High School went coed.
2001			Kyoei University was established in Kasukabe city, Saitama.
2003			Kyoei Gakuen High School went coed.
2003			Kasukabe Kyoei Junior High School was established in Kasukabe city, Saitama.
2004			Construction of a new school building was completed at Kyoei Gakuen Junior High School.
2005			A new school building was constructed at Kasukabe Kyoei Junior High School.