Apropos the posts before the mojitos, note the following interview with Inoue Kyoichi of the Yoshinkan. http://www.aikidojournal.com/article.php?articleID=313
. In particular:
1. Shioda riding on the train with Ueshiba holding the latters iron fan, asked to hit him when he fell asleep
2. A comparison of Yukawa (amazingly strong ex-judoka prewar deshi unable to execute a technique on a visiting judoka that Akazawa (much less strong, aikido only deshi) was then able to execute
3. Tenryu practicing with Shioda
4. Shioda helping out Kushida when teaching the riot police.
All relevant to the question of who is "taking" ukemi, nage or uke - - - or both.