O'Sensei learned Daito-ryu Aikijujutsu from Takeda Sokaku.
Who was your Daito-ryu Aikijujutsu teacher?
Never mind asking Mr Harden this question , why not simply ask him who did he study Aikido with/where did he train/when did he train/and what is his rank? Like you I would like to know his own background and while I think some of his comments are valid I am not too happy about the statement that anyone not doing 'True Aiki'[Mr Hardens ?] the rest are imposters. A bit insulting to say the least. Cheers, Joe.