“Head of a family” in Japanese
Short answer
Head of a family in Japanese is “当主” (toushu). Full meaning: (present) head of a family.
Other ways to say “Head of a family” in Japanese
家長
kachou head of a family, patriarch, matriarch
筆頭者
hittousha head of a family, first name on a list
一家の長
ikkanochou head of a family
族長
zokuchou patriarch, head of a family
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