- April /1888
Otemon Gakuin was founded. It has its origins in the elementary school attached to Osaka Kaikosha, whose foundation was proposed in 1888 by Lieutenant General Tomonosuke Takashima, commander-in-chief of the Osaka Garrison.
- April /1966
Otemon Gakuin University opened with the Department of Economics in the Faculty of Economics; the Department of Psychological Social Sciences, the Department of East Asian History and the Department of English and American Language and Literature in the Faculty of Letters.- June/1967
- The Center for Australian Studies was established.
- April/1969
- The Institute for Educational Research was established.
- April/1970
- The Departments of Psychological Sciences and East Asian History were reorganized as the Departments of Psychology, Sociology and East Asian Cultures respectively.
- April/1971
- The Department of Management was formed in the Faculty of Economics.
- April/1973
- The Graduate School of Letters was established with the Graduate Course of Psychology (Master´s Course).
- April/1975
- The Graduate Course of Sociology (Master´s Course) was added to the Graduate School of Letters.
- April/1977
- The Graduate Course of Chinese Culture (Master´s Course) was added to the Graduate School of Letters.
- April/1979
- The Graduate School of Economics was established with the Graduate Course of Economics (Master´s Course).
- April/1984
- The Graduate Course of English (Master´s Course) was added to the Graduate School of Letters.
- April/1985
- The Graduate Course of Business Administration (Master´s Course) was added to the Graduate School of Economics.
- April/1995
- The Faculty of Management, comprised of the Department of Management, was established.
The Faculty of Humanics, comprised of the Departments of Psychology and Sociology, was established.
Comprehensive Center for Information and Language Education was opened. - April/1998
- The Faculty of Economics opened the Department of International Economics.
The Faculty of Letters reorganized the Department of East Asian Culture into the Department of Asian Studies.
The Faculty of Letters reorganized the Department of English and American Language and Literature into the Department of English. - April/1999
- The Faculty of Management opened the Department of International Management.
The Graduate School of Economics opened a doctoral program in the Graduate Course of Business Administration. - April/2000
- The Graduate School of Economics opened a doctoral course in the Graduate Course of Economics.
- April/2002
- The Center for International Studies was established.
- April/2004
- The Psychological Center for Community Support was established.
- April/2005
- The Faculty of Economics reorganized the Department of International Economics into the Department of Human Economy.
The Faculty of Management reorganized the Department of International Management into the Department of Marketing. - May/2005
A renovation of the University Library was completed. The Teru Miyamoto Museum was opened annexed to the library to honor the award-winning novelist, who was among the first graduates of the university.- April/2006
- The Department of Psychology in the Faculty of Humanics was upgraded to the Faculty of Psychology.
The Department of Sociology in the Faculty of Humanics was upgraded to the Faculty of Sociology.
The Graduate Course of Business Administration in the Graduate School of Economics was elevated to the Graduate Course of Business Administration in the Graduate School of Business Administration. The Institute of Venture Business Research was founded. - December/2006
The Central Building and No. 6 Building were constructed.- March/2007
A ceremony was held to celebrate the 40th anniversary of the University.- April/2007
- The Department of Asian Studies in the Faculty of Letters was reorganized into the Department of Asian Studies in the Faculty of International Liberal Arts.
The Department of English in the Faculty of Letters was reorganized into the Department of English in the Faculty of International Liberal Arts. - April/2008
- The Graduate Course of Psychology in the Graduate School of Letters was elevated to the Graduate Course of Psychology in the Graduate School of Psychology.
- November/2008
- The Otemon Gakuin Educational Foundation celebrates the 120th anniversary.