DRTS (Data Relay Transponder Satellite) was a Japanese geostationary communications spacecraft. The nearly cubical (2.2 m x 2.4 m x 2.2 m) 2.8-ton (with fuel), 2.1-kW (from a 17 square-meter array) spacecraft was to relay images and data procured by the to-be-launched ADEOS 2 and ALOS satellites, and the KIBO module on ISS, through its S- and Ka-band transponders, after being parked over 90° E.

DRTS/Kodama was built by Mitsubishi for the Japanese NASDA space agency and has a mass of 1300 kg (dry), plus a further 1500 kg of propellant at launch for its propulsion system. The apogee engine was a 500N downrated version of the 1700N LAPS-derived engine used in the earlier COMETS satellite. DRTS had a 3.6-meter Ka-band dish.

• 2002 September 10 - DRTS - Launch Site: Tanegashima. Launch Complex: Y. Launch Vehicle: H-2. Mass: 2,800 kg (6,100 lb). Perigee: 35,770 km (22,220 mi). Apogee: 35,804 km (22,247 mi). Inclination: 0.00 deg. Period: 1,436.10 min.
  Launch delayed from August 2002. First operational flight of H-2A booster. DRTS (Data Relay Transponder Satellite) was a Japanese geostationary communications spacecraft which was to relay images and data procured by the to-be-launched ADEOS 2 and ALOS satellites, and the KIBO module on ISS, after being parked over 90° E. However the engine failed after a couple of burns. As of 2007 Mar 11 located at 90.76E drifting at 0.005W degrees per day.