Launch Overview

The Japan Aerospace Exploration Agency (JAXA)'s KIZUNA satellite is responsible for the demonstration of the validity and usefulness of technologies related to large-capacity data communications in our space infrastructure project, "i-Space," the purpose of which is to promote the use of satellites in such fields as Internet communications, education, medicine, disaster measures and Intelligent Transport Systems.
KIZUNA will lead to ultra-high speed international Internet-based communications. The technology takes advantage of the fact that satellite communications are far-reaching, multicasting and disaster-resistant. Ultra-fast satellite-based Internet-based communications will remove the so-called digital divide by providing high-speed Internet service in areas where the terrestrial communications infrastructure is poor. Among other uses, this will make possible great advances in telemedicine, which will bring high-quality medical treatment to remote areas, and in distance education, connecting students and teachers separated by great distances.
More datails (JAXA's website)

MHI has prepared an H2A2024 model of the H-IIA launch vehicle equipped with four solid strap-on boosters (SSB) to launch KIZUNA into geostationary transfer orbit. The payload fairing model is 4S (four meters in diameter; dedicated launch fairing).
MHI has applied the LE-5B-2, improved LE-5B liquid rocket engine for the second stage engine to reduce the vibration level for the second stage.
In addition, for the SRB-A solid rocket booster, MHI has applied an improved nozzle and high combustion pressure motor, both verified through the data acquisition tests conducted by JAXA using a full scale model in July, 2006.