ISTS (International Symposium on Space Technology and Science) is the most popular international conference in Japan concerning space technology and science. Its objectives are to encourage specialists of space engineering, space science, space medical and space law to exchange information through presentations and to promote space related activities. ISTS is organized biennially. Since the first symposium was held in 1959 in Tokyo, Japan, ISTS has been held constantly, recently biennially, in Japan and the 27th ISTS in 2009 was the 50th anniversary of ISTS.
The last 5 symposia were held in the following cities, the 24th in Miyazaki in 2004, the 25th in Kanazawa in 2006, the 26th in Hamamatsu in 2008, the 27th in Tsukuba in 2009 and the 28th in Okinawa in 2011. The last (28th) symposium whose main theme was “Exploring Humans, Earth and Space”~ the quest begins in the island of peace Okinawa~ was held successfully in Okinawa from June 5 till June 12 in 2011 in cooperation with some related organizations with 881 attendants from 18 countries and 676 presentations.