At 12:30 pm on July 10, 2005, the Japan Aerospace Agency (JAXA) successfully launched M-V Launch Vehicle No.6 (M-V-6) from the Uchinoura Space Center in Kagoshima prefecture, Japan.
It carried an X-ray astronomy satellite (ASTRO-EⅡ) into orbit. Since 1979,Japan has launched four X-ray astronomy satellites, HAKUCHO, TENMA, GINGA, and ASCA, to perform space-based observations of X-ray sources.
ASTRO-EⅡ aboard the M-V-6 launch vehicle is equipped with five soft X-ray telescopes, one with an X-ray spectroscope and each of the remaining four with a CCD camera. ASTRO-EⅡ also has a hard X-ray detector with the capability to cover high-energy, or "hard," X-rays at the highest sensitivity ever achieved. The objective is to observe high-energy processes in the universe, such as those occurring in black holes and clusters of galaxies. Once in-orbit, ASTRO-EⅡ was named "SUZAKU".
IHI Aerospace Co., Ltd. was responsible for the integration of the M-V rocket, in addition to the development and manufacture of the first through third stage solid propellant rocket motors, and pyrotechnics of the separation system.

At 6:25 pm on February 26, 2005, Japan Aerospace Exploration Agency (JAXA) successfully launched the H-ⅡA Launch Vehicle No.7 (H-ⅡA F7) from Tanegashima Space Center in Kagoshima-ken, Japan.
The H-ⅡA F7 put the “Multi-functional Transport Satellite-1 Replacement”(MTSAT-1R) into the orbit.
The MTSAT-1R has two important functions; a weather observation satellite as the successor of “Himawari” and a next-generation air navigation satellite. On November 2003, the solid rocket booster (SRB-A) failed in the separation at the launch of H-ⅡA F6. Since then, IHI Aerospace Co., Ltd. has been laboring for the improvement of the SRB-A, and the H-ⅡA F7 was the first launch of the improved SRB-A. This time, two SRB-As were successfully separated at 2min 7sec after liftoff almost as planned.
IHI Aerospace Co., Ltd. is responsible for development and manufacture of the solid rocket boosters (SRB-As), the pyrotechnics for the rockets separation, and the 2nd stage reaction control gas jets.
We also supported the launch at Tanegashima Space Center.

On December 13 at 9:33 am（JST）, Japan Aerospace Exploration Agency (JAXA) launched the 35th S-310 rocket (with an overall length 7. 8m, total weight approx.
0. 8t) at Andoya Rocket Range in Norway.
The object of this launch is to study the upper atmospheric dynamics and energetics in the lower thermosphere associated with the auroral activity.
For this mission the S-310 rocket carried the instruments that made measurements of neutral temperature and density as well as auroral emission rate, electron density and temperature, and simultaneously the observation was conducted with the ground-based instruments.
The rocket separated payload fairing after 60 seconds of launching, and the instruments onboard the rocket succeeded in obtaining the data effectively. After 180 seconds of launching, the rocket reached at 140 km altitude, and after that it splashed in the north ocean of the Andoya. IHI Aerospace Co., Ltd. is responsible for developing and manufacturing the S-310 rocket.