The Kappa series represented Japan's first large post-war indigenously-developed sounding rockets. They led eventually to the Lambda and Mu solid rocket satellite launchers.

• Kappa-6tw rocket reaches 30 miles.

  Japanese Kappa-6tw two-stage rocket flown to 30-mile altitude over Michikawa Rocket Center, Japan.

• 17 - Emme, Eugene M, Aeronautics and Astronautics: An American Chronology of Science and Technology in the Exploration of Space 1915-1960, NASA, 1961. HTML when accessed: http://www.hq.nasa.gov/office/pao/History/timeline.html