This is a 1:15 scale model of the H-I, the third rocket built by Japan's National Space Development Agency (NASDA). The H-I had liquid-fuel engines on both its first and second stages, a solid-fuel third stage, and nine strap-on solid rockets to enhance boost at liftoff. It used a combination of American and Japanese technology. NASDA launched the H-I nine times from 1986 to 1992 with no launch failures, placing 13 communications, weather, ocean observation, and remote-sensing satellites in Earth orbit. The larger and more powerful H-II rocket, which first flew in 1994, replaced the H-I. NASDA built this model and donated it to NASM in 1991.