I remember teaching meditation and weapons training at OC Aikikai - years ago. One day, we had a visit from a guest instructor at the dojo who was also a high rank Kendoka. He asked if I did any sparring with swords. I said, "sure". There were some padded type shinai so we used those. One of my students filmed some of the sparring. Click on this text to see that film footage.
I've included a short demonstration of the use of intention (Nen in Japanese), energy (Ki) and the redirection of force. Uke was Aikido Master Mohanad Al Kabi. Watching was 95 year old 10th dan Judo Grandmaster (and Black Belt Hall of Fame member) Sid Hallburn. Click on the text and Enjoy!