Space Tethered Autonomous Robotic Satellite II or STARS-II, was a nanosatellite built by Japan's Kagawa University to test an electrodynamic tether in low Earth orbit, a follow-on to the STARS mission.

[3] The electrodynamic tether was made from ultra-thin wires of stainless steel and aluminium.

However, the beacon from the mother spacecraft later became strong, and it was inferred that the solar arrays and antennas were deployed by restarting.

[7] A follow-on to the STARS and STARS-II satellites, STARS-C (Space Tethered Autonomous Robotic Satellite-Cube, COSPAR 1998-067KR, SATCAT 41895[8]) was announced as a satellite to be launched from the Japanese Experiment Module of the International Space Station.

Estimates from orbital drag measurements suggest that the tether deployed to a length of about 30 meters.