Throughout history, Japanese marital systems had gone through many changes along with changes in Japanese social systems and conditions. The most important and historical change in the Japanese marital system was brought about through the rise of "bushi" warriors in the 13th and 14th centuries. The change from the age of aristocracy to the age of the shoguns led to a change from the old practice of “muko-iri” to the new practice of “yome-iri”. That is, instead of the groom joining the bride’s family ("muko-iri"), the bride would join the groom’s family ("yome-iri") after the birth of a child or the loss of a parent.