The origins of Seiunchin are steeped in controversy and mystery.
As kanji never reveals a definite literal translation, Seiunchin is mostly accepted one of two ways; the "Storm within the calm" or more likely “To Grab and Pull in Battle”. It is this later translation that fits well in bunkai as it consists of numerous grabs, pulls, throws and locks.
As the true meaning or origin of Seiunchin has largely been lost to time, many speculate that it was descended from Hsing-I Chuan (XingYiQuan), an internal Chinese martial art system similar to Pa Kua Chang (BaGuaZhang) and Tai Chi Chuan (TaiJiQuan). These "Internal Styles" incorporate Chi Kung (Qi Gong), Meditation... via breath and movement control.
Seiunchin is also thought of as an internal kata for many inherent aspects, as example the slow rhythmic motions, or the issuance of power through circular movement over the ballistic power of an individual limb. Another reason would be in the deep grounded, breathing control utilized throughout the Kata, but what about the idea that the study of Kyusho brings.... and that is attacking the "Internal" man, not the shell.
There are many vital structures of the human anatomy that are deep within it's shell of skin, muscle and bone. In this presentation we are working primarily with the vascular and blood transport, storage and filtration or the disruption, destruction of it or it's components.
Learn how the postures and actions in this Kata work to affect the blood system of the human body.
It was told to me that the only Kata Taika Oyata would not teach publicly is Seiuchin... was it his secret Kata???
This film is available exclusively for Platinum members (along with the full Kyusho library of over 70 films) at: http://www.kyusho.com/membership-options/platinum-membership/seiuchin-blood-attacks/