跡継ぎ

(1)a person who follows next in order; "he was President Lincoln's successor"

(2)順序において次に続く人

(3)a thing or person that immediately replaces something or someone

(4)すぐに何かか誰かの後任になるものあるいは人

(5)a person who inherits some title or office

(6)ある地位や職を継承する人

(7)hereditary succession to a title or an office or property

(8)称号、任務または資産の遺伝継承