Re: non-Japanese cannot become shihan anymore?
I'm not sure why people are surprised and annoyed that the headquarters tries to maintain some level of control. Isn't that the role of a headquarters? Maybe the question should be, why are there no non-Japanese instructors on the Hombu staff given it's international role?
Is it racism? Is it an expectation that a sufficiently proficient foreigner should go back to his homeland to spread the word?
It would also be interesting to know how the non-Japanese "people in charge" of Aikikai organisations feel they are being treated. I don't know of any major defections by such organisations, so maybe it isn't so bad. I'm sure there are some gripes as no organisation the size of the Aikikai could possibly keep everybody happy all the time.