Earth Observation Research Center (EORC) http://www.eorc.nasda.go.jp/ Earth Observation Research Center (EORC) was established to promote an effective and wide use satellite data for earth environmental science. Hiraiso Solar Terrestrial Research Center (HSTRC) http://hiraiso.crl.go.jp/ HSTRC belongs to Communications Research Laboratrory (CRL), Ministry of Posts & Telecommunications. Space disturbances cause a serious influence on human activities. Research activities at the HSTRC are dedicated for a better understanding of the solar-terrestrial relationship and its application to the prediction services. Japan Spaceguard Association http://pluto.mtk.nao.ac.jp/SGFJ/index-e.html National Aerospace Laboratory (NAL) http://www.nal.go.jp/Welcome-e.html Since its establishment in 1955 as a national center to accommodate advanced and large-scale aeronautical test facilities, the National Aerospace Laboratory (Aeronautical, at the outset) has been continually scaling up its activities. National Space Development Agency of Japan, NASDA http://www.nasda.go.jp/index_e.html Established to act as the nucleus for the development of space and promote the peaceful use of space. This web site is a compilation of overall information about the organization of NASDA, its activities, technology, and publications. Menu items listed in the site include NASDA's structure, launch information, press releases and technical information, covering a wide variety of NASDA's current activities. The Institute of Space and Astronautical Science (ISAS) http://www.isas.ac.jp/index-e.html ISAS is Japan's national space research center.