The 'chakuryu succession' started among the samurai society first in terms of preventing the shoryo (territory) from being scattered, and it was not until the late Kamakura period that the basis of the system was realized by the whole society.
所領の分散防止の観点から武士社会において先行して社会全般において「嫡流継承」の原理が完成するのは鎌倉時代後期に入ってからである。