H-IIB Launch Vehicle
Japan's heavy-lift H-IIB launch vehicle, derived from H-IIA with a clustered pair of LE-7A first-stage engines, one LE-5B second-stage engine, and four SRB-A solid rocket boosters.
Follow this vehicle family
Future launches and major activity directly linked to this vehicle family.
Identity
- Aliases
- H-IIBH2BH-IIB Launch Vehicle
- Family Name
- H-IIB
- Full Name
- H-IIB Launch Vehicle
- Roles
- -
- Status
- retired
- Type
- rocket
Details
- Description
- Japan's heavy-lift H-IIB launch vehicle, derived from H-IIA with a clustered pair of LE-7A first-stage engines, one LE-5B second-stage engine, and four SRB-A solid rocket boosters.
- First Flight Year
- 2,009
- Last Flight Year
- 2,020
- Propulsion Configurations
- Entries
- Count
- 2
- Placement
- core
- Propulsion System
- Role
- main
- Stage
- first-stage
- Variant Notes
- Two clustered LE-7A liquid-hydrogen/liquid-oxygen staged-combustion engines.
- Count
- 1
- Placement
- upper
- Propulsion System
- Role
- upper-stage
- Stage
- second-stage
- Variant Notes
- One LE-5B-2 expander-bleed upper-stage engine, the vibration-reduced LE-5B development identified by JAXA for H-IIB.
- Count
- 4
- Placement
- booster
- Propulsion System
- Role
- booster
- Stage
- first-stage
- Variant Notes
- Four SRB-A solid rocket boosters.
- Name
- H-IIB standard configuration
- Notes
- H-IIB uses two LE-7A core engines, four SRB-A boosters and one LE-5B-2 upper-stage engine. JAXA engine-development reference: https://www.rocket.jaxa.jp/rocket/engine/le5b/index.html .
- Rocket Specs
- Reusability
- expendable
- Stages Count
- 2
- Strap On Boosters Count
- 4
Links
- Official Url
- https://global.jaxa.jp/projects/rockets/h2b/
- Wikipedia Url
- https://en.wikipedia.org/wiki/H-IIB
Assets & Meta
- Creation Time
- August 13, 2026 at 21:42:37 UTC
- Updated Time
- October 29, 2026 at 15:33:44 UTC