The Japanese use of the word "ki", meaning a type of inner energy - the force within - is explored here by the 17th descendent of the "Tougun-ryo" school of fencing and member of a distinguished Samurai family. He examines the nature and practice of ki in martial arts, from historical records, and through scientific examination. He also looks at the connection between ki and Shinto (Japan's own religion) and Aikido.
