summer school
| 1988 | Clark Foreign Language School was founded in Nagata-ku, Kobe City on 1st of October |
| 1989 | Recognized by the Association for the Promotion of Japanese Language Education (JAPE) as an educational institution of Japanese language |
| 1991 | The school moved to the front of JR Kobe Station |
| 1992 | Educational Foundation JYOKEI GAKUEN, Clark International College was established and accredited by Hyogo Prefectural Government as first Japanese language vocational school in Japan and realized as a four-year consistency in education from Clark Foreign Language School (Japanese language school) through Clark International College (vocational school) |
| 1994 | Number of students exceeded 300 |
| 1995 | The school was temporarily closed due to Hanshin Awaji Earthquake |
| 2001 | Clark International College was reopened |
| 2002 | Clark Mizuta Commemoration Scholarship was founded Clark Foreign Language School increased the capacity to 300 |
| 2003 | International Japanese Development Agency was established Purchased a school building at Owakidai, kita-ku, Kobe |
| 2004 | Clark Northwest International College was opened at Owakidai |
| 2006 | Japanese Language Preparatory Course was established in Clark International College |
| 2007 | The school was moved to 7th floor of Center Plaza West, at Sannomiya, Chuo-ku, Kobe |
| 2008 | Clark Foreign Language School and Clark International College Japanese Language Preparatory Course were recognized as an accredited school by Japan Immigration Bureau |
| 2010 | Total number of students exceeded 650 in January |
