1853

Local Gentlemen, Akira Sakatani will became the first director of Kojokan.

1868

Mr Sakata Keiken appointed as the Second Generation- President.

1874

It becomes a private school with kanji and mathematics as two departments.

1900

Mr Yamashita Akiduo as Third Generation - President.

1908

To set up general education curriculum in Junior High School.

1936

Set up of Commercial School.

1944

Takeshi Yamashita became the Fourth Generation-President.

1948

Junior high school and high school (ordinary, commercial, industrial) established by school reform. Normal course specialization

1953

Founding 100th anniversary ceremony was held.

1954

The school gates, former auditorium, and red plum blossoms will be Okayama prefecture designated historical sites.

1960

Setting up of Department of Electrical.

1964

To commemorate the completion of the South Building as training building.

Founding 110th anniversary ceremonial.

1969

Erected in front of the gate (The Monument of The World) and next to the school gate ( White Deer Cave Bulletin Board)

1973

Founding 120th anniversary ceremonial.

1974

Mr. Okuo Otsuka became the Director and Mr. Tatsuya Morimoto became the Principal.

1982

Mr. Tatsuya Morimoto becomes the President and Principal.

1983

Founding 130th anniversary ceremonial.

Gymnasium completed as a memorial project.

1986

Archery field completion.

1987

Inauguration of Principal Yoshitaka Yamashita.

1990

Completion of the new building, together with a memorial ceremony.

1993

Founding 140th anniversary ceremonial.

1996

Yukio Morita was appointed principal.

1997

Okayama Prefecture Designated Historical Site, Kojokan Auditorium, Repair and Maintenance work completed.

1998

Otsuka Nagamori appointed as Director

2000

Department of studies reorganization, which involved General Studies Department, Information Business Department and Information Technology Department.

2001

Masahiro Mishima became the principal.

2002

Harada Sumihiko became President. Student dormitory, Kojokan library were completed.

2003

Kazuhito Fukuda became the principal.

Takayuki Otsuka appointed Chief Director.

Founding 150th anniversary ceremonial.

2004

General course of Super Academy course.

Regional seminar started.

2005

Women's 17th National High School Ekiden relay races.

2006

All are ordinary courses. Super advanced courses are divided into two courses of A and B,

Basic course are comprehensive course course and information business course,

Three courses of engineering which based on “thesis” as the school setting subject.

2007

Inoue Kazuma appointed as The President.

2008

Participated the 80th national high school baseball championship.

Shogo Otani became the Principal.

2009

School bus service started in Higashi Fukuyama Fuchu.

2010

Set up the advance science course and increase the number to 60 people.

Established general advanced course, regional industry, civil service system.

"Anthropology" is the school designated core subject.

Runner up for the Women's 22nd National High School Ekiden Race Tournament.

Started operating school bus on the 4th Route, towards Kawakami / Shin Kurashiki.

2013

Founding 160th anniversary ceremonial.

New School Building (East Building)· Harada Tsunji Memorial Stadium· Komatsu Yasuhiro Memorial Education Dormitory Completed.

2014

Ayako Sakatani became the eighth President.

Reformed of National Public Special Admission for the regional Industry, culture and sports courses.

2015

Completely new courses established, renamed regional industry as career design course, culture and sports as sports course.

2016

Completely new courses established.

Okihisa appointed Principal.