While I was in Brazil, I heard that there is no such thing and it's against the Aikido principles, but I don't remember more than that. In the UK, I heard about some guys that do it. Is there really ...
stslavik in an answer related to Kenjutsu mentions the concepts of mushin, fudoshin, and zanshin as part of Fudo Myo-o. While I am somewhat familiar with all three, I am seeking a more in depth ...