The H-II rocket is a Japanese launch vehicle developed by the National Space Development Agency of Japan (NASDA), now part of JAXA (Japan Aerospace Exploration Agency). It was designed to carry payloads into low Earth orbit and was first launched in 1994. The H-II features a two-stage design, utilizing liquid fuel for its engines, which allows for efficient and powerful launches. The H-II rocket has been instrumental in deploying various satellites and supporting international space missions. It has undergone several upgrades, leading to improved performance and reliability. The H-II series includes variants like the H-IIA and H-IIB, which have expanded Japan's capabilities in space exploration and satellite deployment.