The Lambda 4S, also known as L-4S, was a type of rocket in the Lambda series of all-solid propellant rockets, developed by Nissan and the Institute of Space and Astronautical Science of the University of Tokyo.
The Lambda 4S was developed as a satellite launcher from the Lambda rockets, which were created as sounding rockets. In 1970, it successfully launched Oosumi, Japan's first artificial [[satellite, into orbit.
