Many times over the years I would hear how Sanchin Kata is Moving Zen.
Posture for one. Back is straight, chin tucked in, tongue at roof of mouth. Legs and butt/hips form a stable 'triangle'. Focus is another. Breathing is a focal point. Intensity of being here and now should be as if you are walking a narrow beam over a ravine. Total concentration of actual thusness is paramount...as if it is a matter of life and death. There are many more...but I like to leave that up to the individual to discover.
If any readers have input would love to hear from you.