1929

Teikoku School of Higher Education for Women founded in affiliation with Teikoku Pharmaceutical College for Women.

1938

Teikoku School of Higher Education for Women incorporated as Teikoku Gakuen Foundation.

1947

With reform of the educational system, Teikoku Gakuen Junior High School founded.

1948

With reform of the educational system, Teikoku School of Higher Education for Women became Teikoku Women's High School.

1951

Teikoku Gakuen Foundation reorganized as Teikoku Gakuen Educational Foundation.

1952

Teikoku Gakuen Kindergarten founded.

1959

Department of Business established in Teikoku Women's High School.

1962

Teikoku Women's High School (Owada Campus) opened.
Teikoku Women's Junior College founded with Department of Domestic Science.

1963

Department of English Literature established in Teikoku Women's Junior College.

1965

Teikoku Women's University founded with a Department of Domestic Science in the Faculty of Domestic Science.
Teikoku Gakuen Owada Kindergarten founded.

1966

Department of Food Science and Nutrition established in the Faculty of Domestic Science, Teikoku Women's University.

1968

Nutritionist Course opened in the Department of Food Science and Nutrition, Faculty of Domestic Science, Teikoku Women's University.

1969

Department of Clothing established in the Faculty of Domestic Science, Teikoku Women's University.

1972

Department of Pedology established in the Faculty of Domestic Science, Teikoku Women's University.

1974

Teikoku Gakuen Junior High School closed.

1975

Department of Domestic Science in the Faculty of Domestic Science, Teikoku Women's University closed.

1976

Department of Early Childhood Education established in Teikoku Women's Junior College.

1977

Teikoku Women's University Kindergarten opened.

1978

Teikoku Women's High School (Owada Campus) became independent as Teikoku Women's University Owada High School.

1979

Ceremony held for 50th anniversary of founding.

1984

Department of Intercultural Relations established in Teikoku Women's Junior College.

1985

Teikoku Gakuen Junior High School renamed Teikoku Women's University Owada Junior High School.

1988

Osaka International University founded with a Department of Management and Information Science in the Faculty of Management and Information Science.

1989

Department of English Literature in Teikoku Women's Junior College renamed Department of English.
Ceremony held for 60th anniversary of founding.

1992

The name Teikoku is replaced with Osaka International at all of the foundation's schools.
Department of Politics and Economics in the Faculty of Politics and Economics established in Osaka International University.
Faculty of Domestic Science, Osaka International University for Women reorganized; Department of Communication and Department of Human Health Science established in a new Faculty of Human Sciences.

1993

Department of Business closed at Osaka International Takii High School.
Graduate School of Management and Information Science established with a Master's Program in Osaka International University.
School of Japanese Studies for Foreign Students established in Osaka International University.
Teikoku Gakuen Educational Foundation renamed Osaka International Educational Institution.
Osaka International Hirakata Kindergarten closed.

1995

Doctoral Program established in the Graduate School of Management and Information Science, Osaka International University.
Faculty of Domestic Science (departments of Food Science and Nutrition, Clothing, and Pedology), Osaka International University for Women, closed.

1996

Osaka International Takii Kindergarten closed.

1997

Department of International Communication and Department of Sports Management established in the Faculty of Human Sciences, Osaka International University for Women.
Recruitment for Department of English, Osaka International College for Women, ended.

1998

Graduate School of Social Sciences established with a Master's Program in Osaka International University.
Department of Communication, Faculty of Human Sciences, Osaka International University for Women, renamed Department of Social Communication.

1999

Ceremony held for 70th anniversary of founding.

2000

Department of Politics and Economics, Faculty of Politics and Economics, Osaka International University, renamed Department of Politics, Economics and Law, Faculty of Politics, Economics and Law.

2002

Faculty of Human Sciences established in Osaka International University.
Department of Social Communication, Faculty of Human Sciences, Osaka International University renamed Department of Psychology and Communication.
Osaka International College for Women renamed Osaka International College.
Department of Global Study established in Osaka International Takii High School.
Osaka International Owada Junior & Senior High School became co-educational.

2005

Department of Early Childhood Education in Osaka International College renamed Department of Child Education and Welfare.

2007

Department of International Communication in Faculty of Human Sciences
reorganized: Faculty of International Communication.

2008

Faculty of Management and Information Science and Faculty of Politics,
Economics and Law reorganized: Department of Management Design and Department of Economics and Finance, Faculty of Business Administration; and Department of Information Design and Department of Law and Public Policy, Faculty of Contemporary Social Studies.
Department of Intercultural Relations and Department of Domestic Science in Osaka International College reorganized: Department of Life Design.
Department of Life Design (Dietitian Course only) and Department of Child Education and Welfare became co-educational.
Osaka International University for Women closed.

2009

Ceremony held for 80th anniversary of founding.

2010

Department of Domestic Science in Osaka International College closed.

2011

Department of Intercultural Relations in Osaka International College closed.

2012

Department of International Communication in Faculty of Human Sciences in Osaka International University closed.

2014

Faculty of Business Administration and Faculty of Contemporary Social
Studies reorganized: Faculty of Global Business.
Department of Life Design became co-educational.

2015

Faculty of International Communication reorganized: Faculty of International Liberal Arts.
Osaka International Owada kindergarten transformed into a Center for Early Childhood Education and Care.

2016

Matsushita-cho sports facility completed.

2018

Faculty of Global Business reorganized: Faculty of Business Administration and Economics.
Department of Sports Management became co-educational.

2019

Ceremony held for 90th anniversary of founding.

2021

Department of Life Design in Osaka International College reorganized:Department of Life Design and Department of Nutrition.

2022

Osaka International High School opened.
Osaka International Junior High School opened.

2024

Osaka International TakiiHigh School combined with Osaka International Junior High School and High School at the new campus.