Greetings Obata Soke,
I learned from a source that in the past there was such thing as "succession techniques". It seemed to be the best or "ultimate technique" in a school and that the technique is only taught to the one person that will carry on as the next generation leader of the system.
I am curious about your opinion in this issue. Is this true for the systems that you know of?
Also, aside from successor-only-techniques, upon reaching the very senior levels (say, RokuDan or NanaDan), have students already learned all the techniques that exist in the system, or are there the "reserved" techniques that are only taught to those in the next level?
Doomo Arigato Gozaimasu,
Leo