Source: Aikido Sangenkai Blog
Daito-ryu Aiki-jujutsu Roppokai Founder Seigo Okamoto was born in 1925 in Yubari City, Hokkaido. In 1963, at the age of 38, he entered the dojo of Daito-ryu Aiki-jujutsu Kodokai Founder Kodo Horikawa, one of Sokaku Takeda’s closest students. In 1974 he received his 7th dan from Kodo Horikawa, and his Shihan license from Kodo Horikawa four years later in 1978.
After Horikawa Sensei passed away, he established his own organization, the Daito-ryu Aiki-jujutsu Roppokai, where he became known for teaching advanced techniques to beginning students and for making public many aspects of Aiki that had previously been considered secret. Seigo Okamoto passed away on January 17, 2015, just a few weeks before his 90th birthday.
In response to a question from Aikido Journal editor Stanley Pranin as to the origin of the name “Roppokai” he explained: