Re: Use of the term Aikido"ka"
So basically, adding "Ka" ( 家 ) is really no different then adding "ist" (Aikidoist) in English, and while it can be used with a tone of reverence, it's not really an extra special honorific like Dr.
Maybe it is kind of akin to "Sir" in English? "Sir" has an older meaning of nobility, and is still used to show knighthood in England. However nowadays "Sir" is commonly used to be polite to when addressing any adult male, regardless of status. Would you say this is a fair comparison?