Starting from 2018, satellites of the Quasi-Zenith Satellite system, or "QZSS", will be increased to four, including the first satellite "Michibiki". Structure and purpose of the system are described in this section. Basic information such as orbit of the satellites, overview of the provided services, used signals, etc. are in this section, too.
Movie introducing QZSS and its service and orbits is available here. Promotional pamphlet is also available. They are useful to understand basic characters of QZSS.