Peter A Goldsbury wrote:
One final note. I once attended Friday evening training in the Aikikai Hombu, taught by Kisshomaru Doshu. The late Arikawa Sadateru was doing ordinary training, as was an 8th dan who shall be nameless. For some reason Arikawa Sensei went over to the 8th dan and had him throw him. He was completely immovable. Arikawa Sensei never explained in clear terms what he 'had' and some posters here might think he was wrong in this.
The comments and questions (not unexpected) from Mr Harden and Mr Sigman are partly why I added the final sentence to the above quote.
I was training with someone else at the time, about fifteen years ago, and saw what was going on as I was doing so. Arikawa Sensei had a fearsome reputation in the Hombu and when he came on the mat 'just to practise', it was best to be aware of where he was and what he was doing. So I cannot say for certain.