Abstract: Japan has been actively developing its reconnaissance satellite system,enhancing the satellite reconnaissance capability and expanding means ofintelligence collection in order to achieve the goalofbecoming amajor military power.Although Japan's satellite reconnaiss ancesystem isfarfrom perfection,itssuccess fuloperation has greatly promoted thecountry'sabilitytocollectintelligence.With the help ofadvanced satellites,Japan willnotonly promote itscom petitive power,butal so occupy a vantage pointin space,causing a delicatechangein thecorrelation of militarypowerin Northeast Asia,even the whole Asian-Pacificregion.