In the book 'Total Aikido' by Shioda Gozo Sensei, there is a short chapter on ogi [奥儀] (hidden techniques). I have also seen other references to ogi in Chida Tsutomu Sensei's DVD and 'Angry White Pyjamas'. Because I'm not from the Yoshinkan, I was wondering:
1) How people in the Yoshinkan feel about ogi?
2) How many ogi are there?
2) When do they start training ogi (if ever)?
3) Do other Aikido groups have ogi?
Thanks very much