家督相続人
the successor to a house―the heir to a house
仮定家督相続人
推定家督相続人
法定家督相続人
under Japanese law, a child who is the true child of the head of a family but has no right to inherit the family estate
in Japan, a system of inheritance in which the eldest daughter inherits everything, called 'anekatoku'
a feud over succession to the head of family
the heir of a head family
the heir apparent