Japan Aerospace Exploration Agency (JAXA) and Mitsubishi Heavy Industries Ltd. are looking into a three-stage rocket that will larger payloads into space.
Currently, limits of the two-stage H-IIA and H-IIB rockets in use have constrained JAXA missions to smaller payloads and probes.
The H-III’s first stage will have three engines adapted from the second stage of the H-IIA and will abandon the use of solid boosters.
