A short but quick and energetic discipline, with hand and foot combinations that suggest conflict in a confined space.
This is the kata that displays the posture of the deity of Goju Ryu Busaganashi and it is said if you study him you will know Goju Ryu.
I believe that Shinzato Jinan Sensei enjoyed performing this Kata. I hope to meet with him in my next life and discuss the finer points.
As to imagination, one can feel the disturbance of the land and the beginning of a land slide, the ups and down that you feel on your descent.
The blocks and attacks that you incur can be an escape from a forest, which has been gnarled in the storm.
As to the second to last move, when you shout, this suggests your defiance in meeting your demise and in the last move the exhalation is the cessation.
Chief Instructor OTGKA