These Bokken exercises make the shoulders relax, which leads to a more relaxed state in the rest of the body. With some tension in the hand and forearm, but no tension in the shoulders, the body can work at its best. Relaxed strength, No-body Relax.
Focus on actively training the thumb and middle finger, while your other fingers move individually and separately from the thumb and middle finger.
When using No-Body Relax in Aikido, you grip with your hand on Booken focusing on the thumb and middle finger, and your other fingers grip as well, but are not focused on them
”No-body Relax” is useful in Aikido and daily life.