| 1947 April |
|
“Numazu Joshi Shogyo Gakko Affiliated Junior High School” established under the new educational system. Mrs. Fuji Katoh inaugurated as the first principal. |
| June |
|
The new junior high school system authorized. |
1954 April |
|
Renamed to “Numazu Joshi Shogyo High School Affiliated Junior High School.” |
| 1960 June |
|
Renamed to “Numazu Joshi Junior High School.” |
| 1972 May |
|
The founder, Mrs. Fuji Katoh, passed away.
Dr. Masahide Katoh inaugurated as the second principal. |
| 1974 April |
|
Renamed to “Katoh Gakuen Junior High School” and the coeducational system started. |
| 1977 March |
|
The first graduation ceremony of Katoh Gakuen Junior High School conducted |
| 1983 May |
|
Renamed to “Katoh Gakuen Gyoshu Junior High School.” |
| 1986 November |
|
The 60th anniversary ceremony of the foundation of Katoh Gakuen conducted. |
| 1987 April |
|
The integrated junior and senior high section initiated. |
| 1990 April |
|
Mr. Hiroshi Okamoto inaugurated as the third principal. |
| October |
|
The School Song established. |
| 1992 November |
|
The First Gyoshu Festival (Culture Festival / Bazaar). |
| 1993 March |
|
Library renovation completed as a part of 10th anniversary celebrations. |
| 1994 April |
|
Mr. Tenji Tsuchiya inaugurated as the forth principal. |
| 1995 April |
|
All junior high school classrooms equipped with air-conditioning equipments. |
| 1998 April |
|
Dr. Masahide Katoh inaugurated as the fifth principal.
The Bilingual Course initiated. |
| 2000 January |
|
Accredited as an IB/MYP School. |
2002 March
November |
|
School uniforms changed.
The three-course (Core・Alpha・Bilingual) system established.
The 20th anniversary ceremony of the school foundation conducted. |
| 2004 December |
|
The Third Katoh Gakuen Symposium: Pitting It All Together . |
