- Family: H2B
- Length: 56.6 m
- Diameter: 5.2 m
- Launch Mass: 551 T
- Low Earth Orbit Capacity: 16500 kg
The H-IIB 304 was manufactured by Mitsubishi Heavy Industries with the first launch on 2009-09-10. H-IIB 304 has 9 successful launches and 0 failed launches with a total of 9 launches. H-IIB (H2B) is an expendable launch system used to launch H-II Transfer Vehicles (HTV, or Kounotori) towards the International Space Station. H-IIB rockets are liquid-fuelled with solid-fuel strap-on boosters and are launched from the Tanegashima Space Center in Japan. Mitsubishi and JAXA have been primarily responsible for design, manufacture, and operation of H-IIB.
