eldest child; first-born child; heir
Refers to the eldest child, especially the one who inherits the family name or estate. Sense 2 (child who carries on the family name) is a natural extension of the first-born role in traditional family systems.
As the eldest child, he succeeded to the family estate.
The eldest daughter is a reliable person.
pre-ritsuryō provincial official
Archaic historical term. In the pre-ritsuryō system, an official appointed in key provinces to oversee administration of his home and surrounding provinces. Not used in modern Japanese.
Before the ritsuryō system, the sōryō was a key figure in local administration.
head of a warrior clan (Kamakura period)
Archaic historical term. Refers to the leader of a warrior clan during the Kamakura period. Not used in modern Japanese.
During the Kamakura period, the sōryō led the warrior band.