1989 October
Vashon Island Senior High School (VISHS), State of Washington was interested in making Himeji Minami Senior High School (HMSHS) their sister school and registered.

1990 March
Vashon Island first internatinal exchange visitts to HMSHS.
September
The Internatinal exchange committee at HMSHS was organized

1991 March
HMSHS students paid their first exchnage visit to VISHS

1992 April
The second group of VISHS studentson their excahnge program to HMSHS.

1993 March
HMSHS second exchange visit to VISHS.

1994 March
VISHS third exchange visit to HMSHS

1995 March
HMSHS third exchange visit to VISHS
Students from Thailand came to HMSHS

1996 April
The forth exchange visit to HMSHS.

1997 March
The forth exchange visit to VISHS.

1998 April
The fifth exchange visit to HMSHS

1999 March
The fifth exchange visit to VISHS
October
On the 50th anniversary of HMSHS, there was a school ceremony.
And a repesentative of both sister shools came to HMSHS.

2000 April
The sixth exchange visit to VISHS
September
The first Chinese internatinal exchange group to 酒泉鋼鉄公司第三中学

2001 March
The sixth exchange visit to VISHS
September
The first Chinese internatinal exchange group from 酒泉鋼鉄公司第三中学
in China visited HMSHS

2002 April
The seventh exchange visit to HMSHS.

2003 March
The seventh exchange visit to VISHS.

2004 April
The eighth exchange visit to HMSHS.
July
Students visit Australia.
November
Students from Malaysia came to HMSHS
December
A student from Australia came to HMSHS.

2005 March
The eighth exchange visit to VISHS