Some of my other blog posts which are relevant:
This partially explains what can often be observed in brown belts. Where their years of correct study allows part of this to occur and as a result the brown belts power increases because they are beginning to be more relaxed in their technique. And too many times, not understanding what has begun to occur, the brown belt may not realize what that change means when they are working with newer students. This can lead to unintentional injury.
At all levels of training the individual requires sensitivity training so they can understand better how to work with others appropriately.
“However, before the policy of the Ministry of Education changed, Mr. Iteshima lay on the sickbed, and died before long. On the other hand, it did not teach these types in the normal school after Mr. Iteshima was deceased because it was not interested in Pinann and the alteration type from the beginning. It might have been thought that it was likely to disappear naturally before long even if it left it. However, students who were taught the modified type from Mr. Iteshima, without knowing the circumstances that have been modified, and then spread the modified type, largely replaced by the existing type, the circumstances that have been altered before long I have forgotten.