Another interesting side note. My son was accepted into Nippon Kan's uchi-deshi program. A couple weeks into it, he had a shoulder injury and a torn abdominal muscle. His sempai's told him the injuries were his fault since his ukemi wasn't good enough.
These things are contrary to what I learned at Okinawa Aikikai. There I learned that sempai was responsible for the safety of kohai. I recommended to my son that he leave immediately. I also fired off a couple of emails to Nippon Kan explaining to them my dissappointment. My son came home and I have been teaching him aikido as I learned it. Nine months later and he is injury free.
(Knock on wood)