Japan had launched various spy satellites. This is the 5th spy satellite that Japan has launched into the Earth’s orbit on 1 February 2015. The other 4 satellites launched by Japan, that are orbiting the Earth include two optical imaging spacecrafts and two radar satellites.
The satellite was taken into orbit by the H-2A (H-IIA) carrier rocket. The satellite carries a sophisticated radar payload designed to survey the globe night and day in all weather conditions from an orbit about 300 miles above Earth.