The HTV avionics module and propulsion module

The first Japanese H-II Transfer Vehicle (HTV) is being prepared for flight to the International Space Station at Tsukuba Space Center. The HTV will join other space vehicles, including Europe's Automated Transfer Vehicle (ATV), in transporting cargo to the ISS at regular intervals. HTV is an unmanned vehicle measuring 10 metres in length and 4.4 metres in diameter at the widest point. HTV has a pressurised section where crewmembers can work when the vehicle is docked with the ISS and an unpressurised section that accommodates payloads for the Japanese Kibo laboratory's Exposed Facility.