Later, Kidendo became hereditary learning and instructors of Kidendo recommended their sons for Kyuryo gakusei in order to make heredity sure and as a result, it became difficult for the sons of families other than hereditary families to apply for the examination even though examinations were conducted.
だが、後に紀伝道の家学化が進むと、紀伝道の教官が世襲を確かなものとするために自分の子弟を給料学生に推挙するようになり、試験を行う場合でも譜第の家以外からの受験が困難になっていった。