Seigo Okamoto was born in 1925 in Yubari City, Hokkaido, and began his aiki studies with Master Kodo Horikawa in 1963 in Hokkaido, Japan.
He trained hard and eventually received his 7th dan rank in 1974. He was also promoted to shihan, which is the master instructor level, in 1978.
He separated from the Kodokai to found Daito-ryu Aikijujutsu Roppokai after moving to Tokyo in 1977. The technical grading syllabus of the Roppokai is very different from the traditional Daito-Ryu Aikijujutsu techniques of the founder Master Sokaku Takeda
His aiki art focuses on quickly executed aiki techniques, that seized an attackers power, and took their balance away from them, with an absolute minimum body movement.
Master Seigo Okamoto is the author of two books and two videos on Daito-ryu Aikijujutsu and travelled regularly to Denmark and Italy to give seminars in his unique aiki art.
Morihei Ueshiba developed Aikido from his combat studies of Daito-ryu Aikijujutsu with Sokaku Takeda, and his spiritual studies with the Omoto Kyo and Onisaburi Deguchi.
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There are several interesting videos on youtube of Master Okamoto Sensei, and I recommend that you go ahead and check them out. Some of them will show you the very fast aiki techniques from grabs that quickly control his attackers.
It seems that some of his uke's tend to exaggerate the effects with grunts of surprise. But, this was a common theme with several of the aiki masters. They made it look as if their uke's were falling for them, but really were cleverly locking the body structure.
This locked body structuring is then suddenly realeased causing loss of balance and shock!
I suspect they allowed no opening for strong attacks!
Sadly Seigo Okamoto died on January 17, 2015, just a few weeks before his 90th birthday. He had many top students who carry on his teachings. I have one of his technical dvd's, which includes excellent wrist and body movement that can help Aikido students.
Check out several important Aiki Masters trained by Sokaku Takeda. These include Yukiyoshi Sagawa, Kodo Horikawa, Morihei Ueshiba, and many more. For more on the amazing Aiki-Jujutsu masters... Click Here