| 1973 | October | Establishment of preparatory office |
| 1974 | January | Establishment of Higashiuji Senior High School
Full-time General Course - 315 students admitted |
| 1974 | March | The plan and construction of first buiding completed |
| 1974 | April | Opening of the school |
| 1974 | September | Creation of the school song |
| 1974 | October | Gymnasium was built and its opening ceremony was held. |
| 1975 | March | Completion of the second building scheme-the second and the third buildings |
| 1976 | March | Completion of the third building scheme |
| 1979 | February | Completion of School ground |
| 1982 | March | Completion of the second gymnasium |
| 1983 | October | The 10th Anniversary celebration |
| 1985 | April | Establishment of 1st and 2nd tracks established in the general course |
| 1987 | August | School gate moved to the present location |
| 1988 | March | Installation of Training gymnasium |
| 1992 | March | Rearrangement of school grounds |
| 1994 | March | Remodeling of the first building |
| 1995 | March | Remodeling of the gymnasium |
| 1996 | March | Installation of all-weather synthetic track for sports |
| 2001 | September | Computer room updated |
| 2002 | April | Introduced the program for supplementary academic guidance "Academic Saturday" |
| 2002 | July | Commencement of the International Exchange Program |
| 2005 | April | Implemented the High School Projects to promote unique education |
| 2006 | April | Implemented the Frontier School Program for academic improvement |
学校紹介
校長挨拶