Check out Robert Frager Sensei he has a DVD that addresses this.
https://www.createspace.com/238419
Aikido and The Five Rings and Stories of O-Sensei
This DVD contains two major videos with Robert Frager, 7th Dan. The first video applies the concepts of The Five Rings of Miyomoto Musashi (Ground, Wind, Fire, Water and Void) to training in Aikido. Included are demonstrations with sword as well as empty hand techniques. (35 min.)
Cheers,
Jeff