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This private demonstration led by Doshu Kisshomaru Ueshiba took place at the Aikikai Hombu Dojo in 1964. KAzuo Chiba, uke.
Sample module from Aikido Extensions with Bruce Bookman.
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Stanley Pranin discusses the post-war Aikikai during a Q&A session in 2016. This was one of the last of such events Pranin Sensei led before his passing in 2017.