It was possible not to be accepted as the successor if he/she couldn't master the "Kata", even if he/she was someone from the next generation of the blood relationship (Besshikuden of "Fushikaden" written by Zeami)
その「型」を習得できない者は、たとえ実際の血縁関係に基づく次世代の人間でも後継者とは認められない場合もあり得た（世阿弥『風姿花伝』別紙口伝）。