This remained the official policy until 2008 when the Basic Space Law was passed. Among other things, this law cleared the way for Japan to expand its space development efforts for national security reasons and in accordance with other international agreements on space.
From the beginning of official efforts to develop space programs, cooperation with the United States, especially the Department of Defense and U.S. defense firms, was of paramount importance. The April 2015 guidelines for U.S.-Japan Defense Cooperation included a section on space. It committed the two nations to provide mutual support in the area of space situational awareness (SSA) cooperation. Simply put, this meant that Japan and the U.S. government and firms with space technology and satellite expertise would work together to develop technologies that would more effectively monitor natural and man-made space objects such as satellites and debris in the Earth’s orbit.
These new systems, of which the new squadron is a part, will identify and counter threats to either their satellites or those of other nations, such as Australia.
In addition to SSA, the 2015 guidelines listed a number of areas related to space in which the U.S. military and Self-Defense Forces would cooperate. Those include the developing of early-warning radar and communications systems and intelligence, surveillance, reconnaissance (ISR) systems, command and control, communications and meteorological observation, among others.
Defense Minister Taro Kono hands the unit flag of the Space Operations Squadron to the head of the unit, Toshihide Ashiki, on May 18. | KYODO
Japan and the U.S. also agreed that, in cases where their space systems are threatened, the U.S. armed forces and Self-Defense Forces will cooperate, as needed, in mitigating risk and preventing damage.
In 2018, the Defense Ministry published its national defense program guidelines for the 2019 fiscal year and beyond. In the space domain, the guidelines said the SDF will actively leverage civilian technologies and work with JAXA, as well as the United States and other countries. A separate defense program for the 2019-2023 fiscal year period said the SDF would establish an Air Self-Defense Force space domain squadron “in order to conduct persistent monitoring of situations in space, and to ensure superiority in the use of space at all stages from peacetime to armed contingencies.” That is the current squadron that was inaugurated on May 18.