Again from George Ledyard's blog, 2009, http://aikieast.blogspot.com/2009/06...training.html:
"The major players influencing the Aikido community right now are as follows:
Ushiro Kenji from Japan - Head of Shindo Ryu Karate
Vladimir Vasiliev (Toronto) and Michael Ryabko (Moscow) of the Systema
Akuzawa Minoru - Head of the Aunkai
Dan Harden (USA) - major influence Daito Ryu
Mike Sigman (USA) - Chinese Martial Arts
Howard Popkin (USA) - Daito Ryu Roppokai"
"Let me say, first and foremost that I believe that training with any of these teachers will drastically alter ones take on Aikido in a positive way. I would not voluntarily pass up any opportunity to train with one of them if I could help it."