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H-IIA Flight Sequence

Fairing: simplified design, simplified manufacturing
Avionics:  box integration, HIC parts application, simplified interface (data bus), automatic check-out support function.
Second Stage:  eliminated LOX / LH2 common bulkhead, LE-5B engine (improved LE-5A), simplified propulsion system.
First Stage:  simplified manufacturing, new core / SRB-A / core stage support concept, simplified propulsion system, LE-7A engine (improved LE-7), modification of the rigging and simplification of the system, increase casting and machining.
Solid Rocket Booster:  one-segment CFRP motor case, miniaturized nozzle, electromechanical TVC system.